Home Web Development JavaScript jQuery Dynamic Calendar Program With CSS | Basic jQuery Calendar

jQuery Dynamic Calendar Program With CSS | Basic jQuery Calendar

March 11, 2020

4594

How we can create a dynamic calendar using only jQuery without any plugin? Solution: See this jQuery Dynamic Calendar Program With CSS, Basic jQuery Calendar.

Previously I have shared an animated HTML CSS JS Calendar program, but this is a dynamic calendar based on jQuery. Basically, a dynamic calendar is completely created with JS or JS library. When we don’t create HTML layout like table or list for creating the calendar, then its called a dynamic calendar. This specific calendar is completely created by jQuery, but the fact is jQuery adding here HTML elements dynamically.

Today you will learn to create Basic jQuery Calendar. Basically, there is a simple calendar with week names in the heading section and dates in the table body section. On the middle top you will see month and year information, and on the top two sides left and right there are two buttons for next and previous month. These two buttons have next and previous month’s name where you can select your month and year, not only next-previous text.

So, Today I am sharing the jQuery Dynamic Calendar Program With CSS. There I have used HTML to create only a few elements, CSS for styling, and jQuery for complete program and creating all calendar items. This is a complete calendar with all basic requirements, you can customize the style and functions of its. You can use this calendar program on your website or project.

If you are thinking now how this basic calendar actually is, then see the preview given below.

Preview Of Basic Calendar UI

See this video preview to getting an idea of how this basic calendar looks like.

Live Demo

Now you can see this program visually, also you can see it live by pressing the button given above. If you like this, then get the source code of its.

jQuery Dynamic Calendar Source Code

Before sharing source code, let’s talk about it. First I have created the header section using HTML <header> tag and div outside the header for calendar items. Inside the header, I have placed two buttons and two headings, buttons for Next and Previous months and headings for show Year and Month. Also in the HTML file, I have linked other files like CSS, JS, jQuery CDN.

Now using CSS I have placed all the items in the right place, as you can see in the preview. With CSS first I gave basic values like size, position, margin, padding, etc to all the elements. There I have styled all the elements which are created using HTML and jQuery also. There I have hidden the calendar on an extra small screen, because it breaks the layout you need a 400px or above screen width to see the program.

jQuery handling here the whole functions in the program. First I stored all weeks name, dates 1 to 31, full-year name, and short year name in the array. Then I placed the dates using for loop for() command, it makes the work easier. After that, created HTML elements dynamically and used if{} else{} statements to declare conditions.

Left all other things you will understand after getting the codes, I can’t explain all in writing. For creating this program you have to create 3 files. First file for HTML, second for CSS, and the third file for JavaScript. Follow the steps to creating this program without any error.

index.html

Create an HTML file named ‘index.html‘ and put these codes given below.

<!DOCTYPE html>
<!--Code BY Webdevtrick ( https://webdevtrick.com )-->
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>jQuery Calendar | Webdevtrick.com</title>
  <link rel="stylesheet" href="style.css">

</head>
<body>
<header>
  <div class="title-content">
    <button id="last"></button><span>
      <h1 id="month"></h1>
      <h2 id="year"></h2></span>
    <button id="next"></button>
  </div>
</header>
<div class="ci-cal-container" id="calendar"></div>

<script src='https://code.jquery.com/jquery-2.2.4.min.js'></script>
<script  src="function.js"></script>

</body>
</html>

<!DOCTYPE html>

<head>

<title>jQuery Calendar | Webdevtrick.com</title>

</head>

<body>

</div>

</header>

</body>

</html>

style.css

Now create a CSS file named ‘style.css‘ and put these codes given here.

/* Code BY Webdevtrick ( https://webdevtrick.com ) */
*, *:after, *:before {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}
:after, :before {
    content: ''
}
body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: sans-serif;
}
header {
    top: 0;
    position: absolute;
    width: 100%;`
    height: 64px;
}
header .title-content {
    position: absolute;
    width: 100%;
    height: 100px;
    text-align: center;
}
header .title-content button {
    position: absolute;
    top: 12px;
    height: 40px;
    text-align: center;
    width: 140px;
}
header .title-content button#last {
    left: 12px;
}
header .title-content button#next {
    right: 12px;
}
header .title-content span {
    float: left;
    margin: 8px 0 16px 0px;
    width: 100%;
    height: 40px;
}
header .title-content span h1,
header .title-content span h2 {
    clear: both;
    float: left;
    margin: 0;
    padding: 0;
    line-height: 1;
    text-align: center;
    width: 100%;
}
header .title-content span h1 {
    font-size: 24px;
    line-height: 32px;
}
header .title-content span h2 {
    font-size: 14px;
}
.ci-cal-container {
    top: 64px;
    position: absolute;
    border: 1px solid #CCC;
    width: 100%;
    height: calc(100% - 64px);}
.ci-cal-container .ci-head {
    top: 0;
    background: #2bb673;
    position: absolute;
    width: 100%;
    height: 40px;
}
.ci-cal-container .ci-head div {
    line-height: 40px;
    float: left;
    color: #FFFFFF;
    font-size: 12px;
    font-weight: bold;
    text-align: center;
    border-right: 1px solid rgba(255,255,255,0.15);
    text-transform: uppercase;
    height: 100%;
    width: 14.28%;
    width: -moz-calc(100%/7);
    width: -webkit-calc(100%/7);
    width: calc(100%/7);
    position: relative;
}
.ci-cal-container .ci-head div:last-child {
    border-right: 0px;}
.ci-cal-container .ci-body {
    top: 40px;
    position: absolute;
    width: 100%;
    height: calc(100% - 40px);
}
.ci-cal-container .ci-body .ci-row {
    clear: both;
    float: left;
    position: relative;
    border-bottom: 1px solid #CCC;
    width: 100%;
    height: 16.6%}
.ci-cal-container .ci-calendar.cal-rows-four .ci-body .ci-row {
    width: 100%;
    height: 25%}
.ci-cal-container .ci-calendar.cal-rows-five .ci-body .ci-row {
    width: 100%;
    height: 20%}
.ci-cal-container .ci-calendar.cal-rows-six .ci-body .ci-row {
    width: 100%;
    height: 16.666%}
.ci-cal-container .ci-body .ci-row:last-child {
    border-bottom: 0;}


.ci-cal-container .ci-body .ci-row .ci-event-row {
    position: absolute;
    left: 0px;
    padding: 3px;
    height: 50%;
    width: 100%;
    z-index: 10;}

    .ci-cal-container .ci-body .ci-row .ci-event-row:nth-child(1) {
        top: 0px;}

    .ci-cal-container .ci-body .ci-row .ci-event-row:nth-child(2) {
        margin-top: -1px;
        top: 50%;}

.ci-cal-container .ci-body .ci-row>div {
    box-shadow: inset 0px 0px 0px 1px white;
    border-right: 1px solid #CCC;
    overflow: hidden;
    float: left;
    height: 100%;
    width: 14.28%;
    width: -moz-calc(100%/7);
    width: -webkit-calc(100%/7);
    width: calc(100%/7);
    position: relative;
}
.ci-cal-container .ci-body .ci-row>div.empty {
    background: #f5f5f5;
}
.ci-cal-container .ci-body .ci-row>div.empty:before {
    background:url(https://webdevtrick.com/wp-content/uploads/black-twill.png);
    position: absolute;
    height: 100%;
    width: 100%;
    opacity: 0.125;
}
.ci-cal-container .ci-body .ci-row>div.ci-today {
    background: #f5f5f5;
}
.ci-cal-container .ci-body .ci-row>div:last-child {
    border-right: 0;
}
.ci-cal-container .ci-body .ci-row>div .ci-date {
    top: 12px;
    left: 12px;
    position: absolute;
    font-size: 12px;
}




.ci-event {
    border-radius: 3px;
    border: 1px solid transparent;
    /* box-shadow: inset 0px 0px 0px 1px white; */
    position: absolute;
    padding: 2px 12px;
    height: calc(100% - 5px);
    z-index: 20;}

.end-cap,
.start-cap {

    top: 0.5px;
    z-index: 1;
    position: absolute;

}

.end-cap-border,
.start-cap-border {

    top: -1.75px;
    z-index: 0;
    position: absolute;

}

.end-cap,
.end-cap-border,
.start-cap,
.start-cap-border {

    width: 0px;
    height: 0px;
    border-style: solid;
    border-color: transparent;

}

.ci-event.public .end-cap,
.ci-event.public .start-cap {

    border-color: transparent #e6f1cd;

}

.ci-event.public .end-cap-border,
.ci-event.public .start-cap-border {

    border-color: transparent #D1DBBB;

}

.ci-event.private .end-cap,
.ci-event.private .start-cap {

    border-color: transparent #cceff2;

}

.ci-event.private .end-cap-border,
.ci-event.private .start-cap-border {

    border-color: transparent #9FBABD;

}

.ci-event.public {

    background: #e6f1cd;
    border-color: #D1DBBB;

}

.ci-event.private {

    background: #cceff2;
    border-color: #9FBABD;

}

.ci-event label {

    font-size: 12px;
    font-weight: bold;
    vertical-align: middle;

}

@media(max-width:360px) {

    body {

        overflow-x: hidden !important;
        overflow-y: auto !important;

    }

    .ci-cal-container .ci-body {

        float: left;
        height: auto;
        position: relative;

    }

    .ci-cal-container .ci-body .ci-row {

        border: 0px;
        height: auto !important;

    }

    .ci-cal-container .ci-body .ci-row .ci-event-row {

        top: 0px;
        clear: both;
        float: left;
        height: auto;
        padding: 0px !important;
        margin-top: 0px !important;
        position: relative;

    }

    .ci-cal-container .ci-body .ci-row > div {

        display: none;

    }

    .ci-event {

        float: left;
        position: relative;
        min-height: 100px;
        left: 0px !important;
        margin: 5px !important;
        width: calc(100% - 10px) !important;

    }

    .end-cap,
    .end-cap-border,
    .start-cap,
    .start-cap-border {

        display: none;

    }

}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

/* Code BY Webdevtrick ( https://webdevtrick.com ) */

*, *:after, *:before {

-webkit-box-sizing: border-box;

-moz-box-sizing: border-box;

box-sizing: border-box;

}

:after, :before {

content: ''

}

body {

margin: 0;

padding: 0;

overflow: hidden;

font-family: sans-serif;

}

header {

top: 0;

position: absolute;

width: 100%;`

height: 64px;

}

header .title-content {

position: absolute;

width: 100%;

height: 100px;

text-align: center;

}

header .title-content button {

position: absolute;

top: 12px;

height: 40px;

text-align: center;

width: 140px;

}

header .title-content button#last {

left: 12px;

}

header .title-content button#next {

right: 12px;

}

header .title-content span {

float: left;

margin: 8px 0 16px 0px;

width: 100%;

height: 40px;

}

header .title-content span h1,

header .title-content span h2 {

clear: both;

float: left;

margin: 0;

padding: 0;

line-height: 1;

text-align: center;

width: 100%;

}

header .title-content span h1 {

font-size: 24px;

line-height: 32px;

}

header .title-content span h2 {

font-size: 14px;

}

.ci-cal-container {

top: 64px;

position: absolute;

border: 1px solid #CCC;

width: 100%;

height: calc(100% - 64px);}

.ci-cal-container .ci-head {

top: 0;

background: #2bb673;

position: absolute;

width: 100%;

height: 40px;

}

.ci-cal-container .ci-head div {

line-height: 40px;

float: left;

color: #FFFFFF;

font-size: 12px;

font-weight: bold;

text-align: center;

border-right: 1px solid rgba(255,255,255,0.15);

text-transform: uppercase;

height: 100%;

width: 14.28%;

width: -moz-calc(100%/7);

width: -webkit-calc(100%/7);

width: calc(100%/7);

position: relative;

}

.ci-cal-container .ci-head div:last-child {

border-right: 0px;}

.ci-cal-container .ci-body {

top: 40px;

position: absolute;

width: 100%;

height: calc(100% - 40px);

}

.ci-cal-container .ci-body .ci-row {

clear: both;

float: left;

position: relative;

border-bottom: 1px solid #CCC;

width: 100%;

height: 16.6%}

.ci-cal-container .ci-calendar.cal-rows-four .ci-body .ci-row {

width: 100%;

height: 25%}

.ci-cal-container .ci-calendar.cal-rows-five .ci-body .ci-row {

width: 100%;

height: 20%}

.ci-cal-container .ci-calendar.cal-rows-six .ci-body .ci-row {

width: 100%;

height: 16.666%}

.ci-cal-container .ci-body .ci-row:last-child {

border-bottom: 0;}

.ci-cal-container .ci-body .ci-row .ci-event-row {

position: absolute;

left: 0px;

padding: 3px;

height: 50%;

width: 100%;

z-index: 10;}

.ci-cal-container .ci-body .ci-row .ci-event-row:nth-child(1) {

top: 0px;}

.ci-cal-container .ci-body .ci-row .ci-event-row:nth-child(2) {

margin-top: -1px;

top: 50%;}

.ci-cal-container .ci-body .ci-row>div {

box-shadow: inset 0px 0px 0px 1px white;

border-right: 1px solid #CCC;

overflow: hidden;

float: left;

height: 100%;

width: 14.28%;

width: -moz-calc(100%/7);

width: -webkit-calc(100%/7);

width: calc(100%/7);

position: relative;

}

.ci-cal-container .ci-body .ci-row>div.empty {

background: #f5f5f5;

}

.ci-cal-container .ci-body .ci-row>div.empty:before {

background:url(https://webdevtrick.com/wp-content/uploads/black-twill.png);

position: absolute;

height: 100%;

width: 100%;

opacity: 0.125;

}

.ci-cal-container .ci-body .ci-row>div.ci-today {

background: #f5f5f5;

}

.ci-cal-container .ci-body .ci-row>div:last-child {

border-right: 0;

}

.ci-cal-container .ci-body .ci-row>div .ci-date {

top: 12px;

left: 12px;

position: absolute;

font-size: 12px;

}

.ci-event {

border-radius: 3px;

border: 1px solid transparent;

/* box-shadow: inset 0px 0px 0px 1px white; */

position: absolute;

padding: 2px 12px;

height: calc(100% - 5px);

z-index: 20;}

.end-cap,

.start-cap {

top: 0.5px;

z-index: 1;

position: absolute;

}

.end-cap-border,

.start-cap-border {

top: -1.75px;

z-index: 0;

position: absolute;

}

.end-cap,

.end-cap-border,

.start-cap,

.start-cap-border {

width: 0px;

height: 0px;

border-style: solid;

border-color: transparent;

}

.ci-event.public .end-cap,

.ci-event.public .start-cap {

border-color: transparent #e6f1cd;

}

.ci-event.public .end-cap-border,

.ci-event.public .start-cap-border {

border-color: transparent #D1DBBB;

}

.ci-event.private .end-cap,

.ci-event.private .start-cap {

border-color: transparent #cceff2;

}

.ci-event.private .end-cap-border,

.ci-event.private .start-cap-border {

border-color: transparent #9FBABD;

}

.ci-event.public {

background: #e6f1cd;

border-color: #D1DBBB;

}

.ci-event.private {

background: #cceff2;

border-color: #9FBABD;

}

.ci-event label {

font-size: 12px;

font-weight: bold;

vertical-align: middle;

}

@media(max-width:360px) {

body {

overflow-x: hidden !important;

overflow-y: auto !important;

}

.ci-cal-container .ci-body {

float: left;

height: auto;

position: relative;

}

.ci-cal-container .ci-body .ci-row {

border: 0px;

height: auto !important;

}

.ci-cal-container .ci-body .ci-row .ci-event-row {

top: 0px;

clear: both;

float: left;

height: auto;

padding: 0px !important;

margin-top: 0px !important;

position: relative;

}

.ci-cal-container .ci-body .ci-row > div {

display: none;

}

.ci-event {

float: left;

position: relative;

min-height: 100px;

left: 0px !important;

margin: 5px !important;

width: calc(100% - 10px) !important;

}

.end-cap,

.end-cap-border,

.start-cap,

.start-cap-border {

display: none;

}

function.js

The final step, create a JavaScript file named ‘function.js‘ and put the codes.

// Code BY Webdevtrick ( https://webdevtrick.com )
;(function($, window, undefined) {

	'use strict';

	$.ciCalendar = function(options, element) {

		this.$el = $(element);
		this._init(options);

	};

	// set the calendars default options
	$.ciCalendar.defaults = {

		   // array of the different days of the week
		   // 'days' for the full string of each day
		   // '_days' for the abbreviation of each day
		   days : ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
		  _days : ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],

		 // array of the different months of the year
		 // 'months' for the full string of each month
		 // '_months' for the abbreviation of each month
		 months : ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
		_months : ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],

		// toggle abbreviations for
		// how days are displayed
		abbr_days: false,

		// toggle abbreviations for
		// how months are displayed
		abbr_months: false,

		// set the left most day in the calendar
		// 0 for sunday, 1 for monday, etc.
		start_day: 0,

		events: {},

		// event handler for when a day (in the current month) is clicked
		dateClick: function($el, $content, dateProperties){ return false; }

	};

	// begin the prototype
	$.ciCalendar.prototype = {

		/*
		 * _init
		 *
		 * Sets the default options into place
		 * and initializes the calendar.
		 *
		 * @param options
		 *
		 */

		_init: function(options) {

			// set the prototype options
			// pulls from defaults unless manually changed
			this.options = $.extend(true, {}, $.ciCalendar.defaults, options);

			// set todays date
			this.today = new Date();

			// set the current month
			this.month = (isNaN(this.options.month) || this.options.month == null) ? this.today.getMonth() : this.options.month - 1;

			// set the current year
			this.year = (isNaN(this.options.year) || this.options.year == null) ? this.today.getFullYear() : this.options.year;

			// set the data array
			this.data = this.options.data || {};

			// generate the calendar template
			this._generate();

			// initialize the events
			this._initEvents();

		},

		/*
		 * _initEvents
		 *
		 * Initializes global events such as
		 * calendar cell clicks.
		 *
		 */

		_initEvents: function() {

			// internalize
			var self = this;

			// handle calendar cell click events
			this.$el.on('click.calendar', 'div.ci-row > div', function() {

				var $cell = $(this),
					idx = $cell.index(),
					$content = $cell.children('div'),
					dateProp = {
						day: $cell.children('span.ci-date').text(),
						month: self.month + 1,
						monthname: self.options.abbr_months ? self.options._months[self.month] : self.options.months[self.month],
						year: self.year,
						weekday: idx + self.options.start_day - 2,
						weekdayname: self.options.days[idx + self.options.start_day - 2]
					};

				if(dateProp.day) {

					self.options.dateClick($cell, $content, dateProp);

				}

			});

		},

		/*
		 * _generate
		 *
		 * Generates a fresh view of the calendar
		 * based on the current year and month.
		 *
		 * @param callback
		 * @return dom
		 *
		 */

		_generate: function(callback) {

			var head = this._getHead(),
				body = this._getDays(),
				rowClass;

			switch(this.rowTotal) {

				case 4 : rowClass = 'cal-rows-four'; break;
				case 5 : rowClass = 'cal-rows-five'; break;
				case 6 : rowClass = 'cal-rows-six'; break;

			}

			this.$cal = $('<div class="ci-calendar ' + rowClass + '">').append(head, body);
			this.$el.find('div.ci-calendar').remove().end().append(this.$cal);

			if(callback) {

				callback.call();

			}

		},

		/*
		 * _getHead
		 *
		 * Generates the weekday strings in the header
		 * of the calendar. Order of weekdays is based
		 * on the options.start_day parameter.
		 *
		 * @return html
		 *
		 */

		_getHead: function() {

			var html =  '<div class="ci-head">';

			for(var i = 0; i <= 6; i++) {

				var pos = i + this.options.start_day,
					j = pos > 6 ? pos - 6 - 1 : pos;

				html += '<div>';
				html += this.options.abbr_days ? this.options._days[j] : this.options._days[j];
				html += '</div>';

			}

			html += '</div>';

			return html;

		},

		/*
		 * _getDays
		 *
		 * Generates the rest of the calendar.
		 * Creates 6 rows, each containing 7 cells.
		 * Cross-checks which day the month starts
		 * and ends on and fills the cells accordingly.
		 *
		 * @return html
		 *
		 */

		_getDays: function() {

			var d = new Date(this.year, this.month + 1, 0),
				monthLength = d.getDate(),
				firstDay = new Date(this.year, this.month, 1);

			// get the starting dat of the month
			this.startingDay = firstDay.getDay();

			// start creating the html output for the calendar cells
			var html = '<div class="ci-body" data-month="' + (this.month + 1) + '"><div class="ci-row" data-week="1">',
				day = 1;

			// loop through the weekdays
			for(var i = 0; i < 7; i++) {

				// add containers for events
				for(var k = 0; k < 2; k++) {

					html += '<span class="ci-event-row" data-event-row="' + (k+1) + '"></span>';

				}

				// loop through week rows
				for(var j = 0; j <= 6; j++) {

					var pos = this.startingDay - this.options.start_day,
						p = pos < 0 ? 6 + pos + 1 : pos,
						inner = '',
						today = this.month === this.today.getMonth() && this.year === this.today.getFullYear() && day === this.today.getDate(),
						content = '';

					if(day <= monthLength && (i > 0 || j >= p)) {

						html += '<div class="' + cellClasses + '" data-month="' + (this.month + 1) + '" data-day="' + day + '" data-events="0">';

						inner += '<span class="ci-date">' + day + '</span>';

						var strdate = (this.month + 1 < 10 ? '0' + (this.month + 1) : this.month + 1) + '-' + (day < 10 ? '0' + day : day) + '-' + this.year,
							dayData = this.data[strdate];

						if(dayData) {

							content = dayData;

						}

						if(content !== '') {

							inner += '<div class="empty">' + content + '</div>';

						}

						++day;

					}else{

						html += '<div class="empty">';

						today = false;

					}

					var cellClasses = today ? 'ci-today ' : '';

					if(content !== '') {

						cellClasses += 'ci-content ';

					}

					html += inner;
					html += '</div>';

				}

				if(day > monthLength) {

					this.rowTotal = i + 1;
					break;

				}else{

					html += '</div><div class="ci-row" data-week="' + (i+2) + '">';

				}

			}

			html += '</div></div>';

			return html;

		},

		/*
		 * _isValidDate
		 *
		 * Referenced from http://stackoverflow.com/a/8390325/989439
		 *
		 * Let's make sure the date being passed through is valid.
		 * Checks day values, month values, leap years, etc.
		 *
		 * @param date
		 * @return array
		 *
		 */

		_isValidDate: function(date) {

			// change date to 'MMDDYYYY' format
			date = date.replace(/-/gi, '');

			// seperate the date string into vars
			var month = parseInt(date.substr(0, 2), 10),
				day   = parseInt(date.substr(2, 4), 10),
				year  = parseInt(date.substr(4, 8), 10);

			// is the month between 1 and 12?
			if((month < 1) || (month > 12)) {

				return false;

			// is the dat between 1 and 31?
			}else if((day < 1) || (day > 31)) {

				return false;

			// there are only 30 days in April, June, September, and November
			}else if(((month == 4) || (month == 6) || (month == 9) || (month == 11)) && (day > 30)) {

				return false;

			// check for leap years
			}else if((month == 2) && (((year % 400) == 0) || ((year % 4) == 0)) && ((year % 100) != 0) && (day > 29)) {

				return false;

			// double check for leap years
			}else if((month == 2) && ((year % 100) == 0) && (day > 29)) {

				return false;

			}

			return {

				day: day,
				month: month,
				year: year

			};

		},

		/*
		 * _clearEvents
		 *
		 * Move the calendar between months and years.
		 * The movement is based on the period and dir
		 * values that are passed into the function.
		 * Period values can be either 'month' or 'year'
		 * and the Dir values 'previous' or 'next'.
		 *
		 */

		_clearEvents: function() {

			$('.ci-event').remove();
			$('.ci-row > div').attr('data-events', 0);

		},

		/*
		 * _updateEvents
		 *
		 * Move the calendar between months and years.
		 * The movement is based on the period and dir
		 * values that are passed into the function.
		 * Period values can be either 'month' or 'year'
		 * and the Dir values 'previous' or 'next'.
		 *
		 * @param array
		 *
		 */

		_updateEvents: function(_events) {

			this._clearEvents();

			// console.log(_events);

			// calculate the number of days between
        	// two supplied dates in mm/dd/yyyy format
            Date.prototype.diffDates = function() {

                var mill = 24 * 60 * 60 * 1000,
                    diff = arguments[0] - this,
                    days = Math.floor(diff/mill);

                return days; // add 1 to include the first day

            }

			// loop through each event supplied in
			// the _events object when the function is called
			$.each(_events, function(index, _event) {

				// define the dom elements we'll need
                var $_event_start_day   = $('.ci-row > div[data-day="' + _event.start['day'] + '"]'),
                	$_event_finish_day  = $('.ci-row > div[data-day="' + _event.end['day'] + '"]'),
                	$_event_start_week  = $_event_start_day.parent(),
                	$_event_finish_week = $_event_finish_day.parent(),
                	$_event_start_cells  = new Array(),
                	$_event_finish_cells  = new Array();

                // define the start date, end date, and number days between them
                var _dateStart  = new Date(_event.start['month'] + '/' + _event.start['day'] + '/' + _event.start['year']),
                    _dateFinish = new Date(_event.end['month'] + '/' + _event.end['day'] + '/' + _event.end['year']),
                    _startPos   = $_event_start_day.index() - 1,
                    _finishPos  = $_event_finish_day.index() - 1,
                    _totalDays  = _dateStart.diffDates(_dateFinish);

                // define the widths of needed elements
                var _blockWidth  = Math.floor($('.ci-row > div').width()), // width of each day in pixels
                	_eventWidth  = _blockWidth * _totalDays, // total width of the event in pixels
                	_eventHeight = Math.floor(($('.ci-event-row').outerHeight() / 2) - 4.5), // get the events height
                	_daysWidth   = _blockWidth * 7, // total width of the calendar in pixels
                	_eventOffset = _startPos * _blockWidth - _blockWidth,
					_eventTotals = _eventWidth + _eventOffset,
					_eventLeftover = _eventTotals - _daysWidth;

				$_event_start_day.addClass('start');

				// make sure the event matches the currently
				// viewed year and month before appending to calendar
                if(_event.start['year'] == calendar.year && _event.start['month'] == calendar.month + 1) {

                	for(var i = _event.start['day']; i <= _event.end['day']; i++){

                		var j = $('.ci-row > div[data-day="' + i + '"]').attr('data-events');

                		j++;

                		$('.ci-row > div[data-day="' + i + '"]').attr('data-events', j);

                	}

                    if(_eventTotals > _daysWidth) {

                    	// this event is long and will carry into the next row

                    	$_event_start_week.find('.ci-event-row').each(function(i, el) {

							$_event_start_cells.push(el);

						});

						$_event_finish_week.find('.ci-event-row').each(function(i, el) {

							$_event_finish_cells.push(el);

						});

                    	var _eventDifference = _eventTotals - _daysWidth,
                    		_eventToDraw = _eventTotals - _eventOffset - _eventDifference;

                		var html_one  = '<span class="ci-event private';
			                html_one += '" style="left:' + (_eventOffset + 6) + 'px;';
			                html_one += 'width:' + (_eventToDraw - _eventHeight - 3) + 'px;">';

			                html_one += '<span class="end-cap" style="';
			                html_one += 'right:-' + Math.floor(_eventHeight/1.5) + 'px; border-width: ' + _eventHeight + 'px 0px ' + _eventHeight + 'px ' + Math.floor(_eventHeight / 1.5) + 'px;';
			                html_one += '"></span>';

			                html_one += '<span class="end-cap-border" style="';
			                html_one += 'right:-' + Math.floor((_eventHeight/1.5) + 2) + 'px; border-width: ' + (_eventHeight + 2) + 'px 0px ' + (_eventHeight + 2) + 'px ' + Math.floor((_eventHeight / 1.5) + 2) + 'px;';
			                html_one += '"></span>';

			                html_one += '<label>' + _event.details['title'] + '<br>starts: ' + _event.start['month'] + '/' + _event.start['day'] + ', ends: ' + _event.end['month'] + '/' + _event.end['day'] + '...</label>';
			                html_one += '</span>';

			            if($_event_start_day.attr('data-events') <= 1) {

		               		$($_event_start_cells[0]).append(html_one);

		               	}else if($_event_start_day.attr('data-events') >= 1) {

		               		$($_event_start_cells[1]).append(html_one);

		               	}else if($_event_start_day.attr('data-events') > 1) {

		               		console.log('view more');

		               	}

			            if(_event.end['month'] === _event.start['month']) {

			            	var html_two  = '<span class="ci-event private';
				                html_two += '" style="left:' + (_eventHeight + 6) + 'px;';
				                html_two += 'width:' + ((_eventDifference - _eventHeight + _blockWidth) - 9) + 'px;">';

				                html_two += '<span class="start-cap" style="';
				                html_two += 'left:-' + Math.floor(_eventHeight/1.5) + 'px; border-width: ' + _eventHeight + 'px ' + Math.floor(_eventHeight / 1.5) + 'px ' + _eventHeight + 'px 0px;';
				                html_two += '"></span>';

				                html_two += '<span class="start-cap-border" style="';
				                html_two += 'left:-' + Math.floor((_eventHeight/1.5) + 2) + 'px; border-width: ' + (_eventHeight + 2) + 'px ' + Math.floor((_eventHeight / 1.5) + 2) + 'px ' + (_eventHeight + 2) + 'px 0px;';
				                html_two += '"></span>';

				                html_two += '<label>...' + _event.details['title'] + '<br>starts: ' + _event.start['month'] + '/' + _event.start['day'] + ', ends: ' + _event.end['month'] + '/' + _event.end['day'] + '</label>';
				                html_two += '</span>';

			  				if($_event_start_day.attr('data-events') <= 1) {

			               		$($_event_finish_cells[0]).append(html_two);

			               	}else if($_event_start_day.attr('data-events') >= 1) {

			               		$($_event_finish_cells[1]).append(html_two);

			               	}else if($_event_start_day.attr('data-events') > 1) {

			               		console.log('view more');

			               	}

			            }

                    }else{

                    	// this event fits within its starting row

                    	$_event_start_week.find('.ci-event-row').each(function(i, el) {

							$_event_start_cells.push(el);

						});

                    	var html  = '<span class="ci-event public';
			                html += '" style="left:' + (_eventOffset + 6) + 'px;';

			                if(_event.start['month'] != _event.end['month']) {

			                	html += 'width:' + (_eventWidth - _eventHeight + _blockWidth - 5) + 'px;">';

			                	html += '<span class="end-cap" style="';
				                html += 'right:-' + Math.floor(_eventHeight/1.5) + 'px; border-width: ' + _eventHeight + 'px 0px ' + _eventHeight + 'px ' + Math.floor(_eventHeight / 1.5) + 'px;';
				                html += '"></span>';

				                html += '<span class="end-cap-border" style="';
				                html += 'right:-' + Math.floor((_eventHeight/1.5) + 2) + 'px; border-width: ' + (_eventHeight + 2) + 'px 0px ' + (_eventHeight + 2) + 'px ' + Math.floor((_eventHeight / 1.5) + 2) + 'px;';
				                html += '"></span>';

			                }else{

			                	html += 'width:' + (_eventWidth + _blockWidth - 5) + 'px;">';

			                }

			                html += '<label>' + _event.details['title'] + '<br>starts: ' + _event.start['month'] + '/' + _event.start['day'] + ', ends: ' + _event.end['month'] + '/' + _event.end['day'] + '</label>';
			                html += '</span>';

			               	if($_event_start_day.attr('data-events') <= 1) {

			               		$($_event_start_cells[0]).append(html);

			               	}else if($_event_start_day.attr('data-events') >= 1) {

			               		$($_event_start_cells[1]).append(html);

			               	}else if($_event_start_day.attr('data-events') > 1) {

			               		console.log('view more');

			               	}

                    }

                }else if(_event.end['year'] == calendar.year && _event.end['month'] == calendar.month + 1) {

                	// this event is being carried over from the previous month

                	$_event_finish_week.find('.ci-event-row').each(function(i, el) {

						$_event_finish_cells.push(el);

					});

					var _newStartPos = _finishPos - _totalDays > 1 ? _finishPos - _totalDays : 1,
						_newStartPos = _newStartPos * _blockWidth - _blockWidth,
						_newEventWidth = _blockWidth * _finishPos - _blockWidth;

					var html  = '<span class="ci-event public';
                        html += '" style="left:' + (_newStartPos + _eventHeight + 6) + 'px;';
                        html += 'width:' + ((_newEventWidth - _eventHeight) - 5) + 'px;">';

                        html += '<span class="start-cap" style="';
                        html += 'left:-' + Math.floor(_eventHeight/1.5) + 'px; border-width: ' + _eventHeight + 'px ' + Math.floor(_eventHeight / 1.5) + 'px ' + _eventHeight + 'px 0px;';
                        html += '"></span>';

                        html += '<span class="start-cap-border" style="';
                        html += 'left:-' + Math.floor((_eventHeight/1.5) + 2) + 'px; border-width: ' + (_eventHeight + 2) + 'px ' + Math.floor((_eventHeight / 1.5) + 2) + 'px ' + (_eventHeight + 2) + 'px 0px;';
                        html += '"></span>';

                        html += '<label>' + _event.details['title'] + '<br>starts: ' + _event.start['month'] + '/' + _event.start['day'] + ', ends: ' + _event.end['month'] + '/' + _event.end['day'] + '</label>';
                        html += '</span>';

                        $($_event_finish_cells[0]).append(html);

                }

			});

		},

		/*
		 * _move
		 *
		 * Move the calendar between months and years.
		 * The movement is based on the period and dir
		 * values that are passed into the function.
		 * Period values can be either 'month' or 'year'
		 * and the Dir values 'previous' or 'next'.
		 *
		 * @param period
		 * @param dir
		 * @param callback
		 *
		 */

		_move: function(period, dir, callback) {

			// take a step back
			if(dir === 'previous') {

				// go back a month
				if(period === 'month') {

					if(this.month > 0) {

						this.month = --this.month;

					}else{

						this.month = 11;
						this.year = --this.year;

					}

				// go back a year
				}else if(period === 'year') {

					this.year = --this.year;

				}

			// put your best foot forward
			}else if(dir === 'next') {

				// go forward a month
				if(period === 'month') {

					if(this.month < 11) {

						this.month = ++this.month;

					}else{

						this.month = 0;
						this.year = ++this.year;

					}

				// go forward a year
				}else if(period === 'year') {

					this.year = ++this.year;

				}

			}

			this._generate(callback);

		},

		/*
		 * _getYear
		 *
		 * Return the current calendar year
		 * @return int
		 *
		 */

		_getYear: function() {

			return this.year;

		},

		/*
		 * _getMonth
		 *
		 * Return the current calendar month
		 * @return int
		 *
		 */

		_getMonth: function() {

			return this.month + 1;

		},

		_getNextMonth: function() {

			var next_month = this.month;

			if(next_month < 11) {

				next_month = ++next_month;

			}else{

				next_month = 0;

			}

			return this.options.abbr_months ? this.options._months[next_month] : this.options.months[next_month];

		},

		_getLastMonth: function() {

			var last_month = this.month;

			if(last_month > 0) {

				last_month = --last_month;

			}else{

				last_month = 11;

			}

			return this.options.abbr_months ? this.options._months[last_month] : this.options.months[last_month];

		},

		/*
		 * _getMonthName
		 *
		 * Return the current calendar month
		 * as a string value. Output will be
		 * determined based on abbreviations
		 * being enabled or disabled.
		 *
		 * @return string
		 *
		 */

		_getMonthName: function() {

			return this.options.abbr_months ? this.options._months[this.month] : this.options.months[this.month];

		},

		_getCell: function(day) {

			var row = Math.floor((day + this.startingDay - this.options.start_day) / 7),
				pos = day + this.startingDay - this.options.start_day - (row * 7) - 1;

			return this.$cal.find('div.ci-body').children('div.ci-row').eq(row).children('div').eq(pos).children('div');

		},

		_setData: function(data) {

			data = data || {};
			$.extend(this.data, data);

			this._generate();

		},

		/*
		 * _gotoNow
		 *
		 * Update the month and year values
		 * to the current date then regenerate
		 * the calendar view.
		 *
		 * @param callback
		 *
		 */

		_gotoNow: function(callback) {

			this.month = this.today.getMonth();
			this.year = this.today.getFullYear();

			this._generate(callback);

		},

		/*
		 * _gotoDate
		 *
		 * Update the calendar to display a
		 * specific month and year based on
		 * the passed values.
		 *
		 * @param month
		 * @param year
		 * @param callback
		 *
		 */

		_gotoDate: function(month, year, callback) {

			this.month = month;
			this.year = year;

			this._generate(callback);

		},

		/*
		 * _gotoNextMonth
		 *
		 * Move the current calendar view
		 * to the upcoming month and then
		 * regenerate the view.
		 *
		 * @param callback
		 *
		 */

		_gotoNextMonth: function(callback) {

			this._move('month', 'next', callback);

		},

		/*
		 * _gotoPreviousMonth
		 *
		 * Move the current calendar view
		 * to the previous month and then
		 * regenerate the view.
		 *
		 * @param callback
		 *
		 */


		_gotoPreviousMonth: function(callback) {

			this._move('month', 'previous', callback);

		},

		/*
		 * _gotoNextYear
		 *
		 * Move the current calendar view
		 * to the upcoming year and then
		 * regenerate the view.
		 *
		 * @param callback
		 *
		 */


		_gotoNextYear: function(callback) {

			this._move('year', 'next', callback);

		},

		/*
		 * _gotoPreviousYear
		 *
		 * Move the current calendar view
		 * to the previous year and then
		 * regenerate the view.
		 *
		 * @param callback
		 *
		 */


		_gotoPreviousYear: function(callback) {

			this._move('year', 'previous', callback);

		}

	};

	/*
	 * _errors
	 *
	 * Basic error logging. Passed errors
	 * are logged through the browser console.
	 *
	 * @param message
	 * @return error
	 *
	 */

	var _errors = function(message) {

		if(window.console) {

			window.console.error(message);

		}

	};

	/*
	 * ciCalendar
	 *
	 *
	 * @param options
	 * @return instance
	 *
	 */

	$.fn.ciCalendar = function(options) {

		// begin a new instance of the calendar
		var instance = $.data(this, 'ciCalendar');

		// if the options being passed into the calendar
		// are in string format, let's go ahead and split
		// it up into a nice shiny array
		if(typeof options == 'string') {

			// shiny new array of arguments
			var args = Array.prototype.slice.call(arguments, 1);

			// loop the arguments
			this.each(function() {

				if(!instance) {

					_errors('cannot call methods on the calendar prior to initialization. ' +
					'attempted to call method "' + options + '"');

					return;

				}

				if(!$.isFunction(instance[options]) || options.charAt(0) === '_') {

					_errors('no such method "' + options + '" for the calendar instance');

					return;

				}

				// valid arguments passed as options
				instance[options].apply(instace, args);

			});

		}else{

			// the options are not being passed as a
			// string. let's parse the passed array
			// and apply them as options

			// loop the arguments
			this.each(function() {

				if(instance) {

					// initialize the existing
					// instance that was passed
					instance._init();

				}else{

					// create a new instance
					// and initialize it afterward
					instance = $.data(this, 'ciCalendar', new $.ciCalendar(options, this));

				}

			});

		}

		return instance;

	};

})(jQuery, window);

var calendar = $('#calendar').ciCalendar({

	dateClick: function($el, $contentEl, dateProperties) {

		console.clear();

		for(var key in dateProperties) {

			console.log(key + ' = ' + dateProperties[key]);

		}

	}

}),

$month = $('#month').html(calendar._getMonthName()),
$year = $('#year').html(calendar._getYear()),
$last = $('#last').html(calendar._getLastMonth()),
$next = $('#next').html(calendar._getNextMonth());

var events = [

	event = {

		details: {

			title: 'This is a longer event that breaks into a new row!',
			location: 'expo center',
			country: 'united states',
			city: 'san diego',
			public: true

		},

		start: {

			time: '12:00pm',
		    month: 7,
		    day: 17,
		    year: 2019,

		},

		end: {

			time: '12:00pm',
		    month: 7,
		    day: 26,
		    year: 2019,

		}

	},

	event = {

		details: {

			title: 'An event that shares days as another event',
			location: 'expo center',
			country: 'united states',
			city: 'san diego',
			public: true

		},

		start: {

			time: '12:00pm',
		    month: 7,
		    day: 20,
		    year: 2019,

		},

		end: {

			time: '12:00pm',
		    month: 7,
		    day: 23,
		    year: 2019,

		}

	},

	event = {

		details: {

			title: 'This is a shorter single row event!',
			location: 'expo center',
			country: 'united states',
			city: 'san diego',
			public: true

		},

		start: {

			time: '12:00pm',
		    month: 8,
		    day: 1,
		    year: 2019,

		},

		end: {

			time: '12:00pm',
		    month: 8,
		    day: 3,
		    year: 2019,

		}

	},

	event = {

		details: {

			title: 'Another short event sharing days',
			location: 'expo center',
			country: 'united states',
			city: 'san diego',
			public: true

		},

		start: {

			time: '12:00pm',
		    month: 8,
		    day: 2,
		    year: 2019,

		},

		end: {

			time: '12:00pm',
		    month: 8,
		    day: 5,
		    year: 2019,

		}

	},

];

calendar._updateEvents(events);

$last.on('click', function() {

	calendar._gotoPreviousMonth(updateMonthYear);

});

$next.on('click', function() {

	calendar._gotoNextMonth(updateMonthYear);

});

$(window).on('resize', function() {

	calendar._updateEvents(events);

});

function updateMonthYear() {

	$month.html(calendar._getMonthName());
	$year.html(calendar._getYear());

	$next.html(calendar._getNextMonth());
	$last.html(calendar._getLastMonth());

	calendar._updateEvents(events);

}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

553

554

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

572

573

574

575

576

577

578

579

580

581

582

583

584

585

586

587

588

589

590

591

592

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

637

638

639

640

641

642

643

644

645

646

647

648

649

650

651

652

653

654

655

656

657

658

659

660

661

662

663

664

665

666

667

668

669

670

671

672

673

674

675

676

677

678

679

680

681

682

683

684

685

686

687

688

689

690

691

692

693

694

695

696

697

698

699

700

701

702

703

704

705

706

707

708

709

710

711

712

713

714

715

716

717

718

719

720

721

722

723

724

725

726

727

728

729

730

731

732

733

734

735

736

737

738

739

740

741

742

743

744

745

746

747

748

749

750

751

752

753

754

755

756

757

758

759

760

761

762

763

764

765

766

767

768

769

770

771

772

773

774

775

776

777

778

779

780

781

782

783

784

785

786

787

788

789

790

791

792

793

794

795

796

797

798

799

800

801

802

803

804

805

806

807

808

809

810

811

812

813

814

815

816

817

818

819

820

821

822

823

824

825

826

827

828

829

830

831

832

833

834

835

836

837

838

839

840

841

842

843

844

845

846

847

848

849

850

851

852

853

854

855

856

857

858

859

860

861

862

863

864

865

866

867

868

869

870

871

872

873

874

875

876

877

878

879

880

881

882

883

884

885

886

887

888

889

890

891

892

893

894

895

896

897

898

899

900

901

902

903

904

905

906

907

908

909

910

911

912

913

914

915

916

917

918

919

920

921

922

923

924

925

926

927

928

929

930

931

932

933

934

935

936

937

938

939

940

941

942

943

944

945

946

947

948

949

950

951

952

953

954

955

956

957

958

959

960

961

962

963

964

965

966

967

968

969

970

971

972

973

974

975

976

977

978

979

980

981

982

983

984

985

986

987

988

989

990

991

992

993

994

995

996

997

998

999

1000

1001

1002

1003

1004

1005

1006

1007

1008

1009

1010

1011

1012

1013

1014

1015

1016

1017

1018

1019

1020

1021

1022

1023

1024

1025

1026

1027

1028

1029

1030

1031

1032

1033

1034

1035

1036

1037

1038

1039

1040

1041

1042

1043

1044

1045

1046

1047

1048

1049

1050

1051

1052

1053

1054

1055

1056

1057

1058

1059

1060

1061

1062

1063

1064

1065

1066

1067

1068

1069

1070

1071

1072

1073

1074

1075

1076

1077

1078

1079

1080

1081

1082

1083

1084

1085

1086

1087

1088

1089

1090

1091

1092

1093

1094

1095

1096

1097

1098

1099

1100

1101

1102

1103

1104

1105

1106

1107

1108

1109

1110

1111

1112

1113

1114

1115

1116

1117

1118

1119

1120

1121

1122

1123

1124

1125

1126

1127

1128

1129

1130

1131

1132

1133

1134

1135

1136

1137

1138

1139

1140

1141

1142

1143

1144

1145

1146

1147

1148

1149

1150

1151

1152

1153

1154

1155

1156

1157

1158

1159

1160

1161

1162

1163

1164

1165

1166

1167

1168

1169

1170

1171

1172

1173

1174

1175

1176

1177

1178

1179

1180

1181

1182

1183

1184

1185

1186

1187

1188

1189

1190

// Code BY Webdevtrick ( https://webdevtrick.com )

;(function($, window, undefined) {

'use strict';

$.ciCalendar = function(options, element) {

this.$el = $(element);

this._init(options);

};

// set the calendars default options

$.ciCalendar.defaults = {

// array of the different days of the week

// 'days' for the full string of each day

// '_days' for the abbreviation of each day

days : ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],

_days : ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],

// array of the different months of the year

// 'months' for the full string of each month

// '_months' for the abbreviation of each month

months : ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],

_months : ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],

// toggle abbreviations for

// how days are displayed

abbr_days: false,

// toggle abbreviations for

// how months are displayed

abbr_months: false,

// set the left most day in the calendar

// 0 for sunday, 1 for monday, etc.

start_day: 0,

events: {},

// event handler for when a day (in the current month) is clicked

dateClick: function($el, $content, dateProperties){ return false; }

};

// begin the prototype

$.ciCalendar.prototype = {

* _init

* Sets the default options into place

* and initializes the calendar.

* @param options

_init: function(options) {

// set the prototype options

// pulls from defaults unless manually changed

this.options = $.extend(true, {}, $.ciCalendar.defaults, options);

// set todays date

this.today = new Date();

// set the current month

this.month = (isNaN(this.options.month) || this.options.month == null) ? this.today.getMonth() : this.options.month - 1;

// set the current year

this.year = (isNaN(this.options.year) || this.options.year == null) ? this.today.getFullYear() : this.options.year;

// set the data array

this.data = this.options.data || {};

// generate the calendar template

this._generate();

// initialize the events

this._initEvents();

* _initEvents

* Initializes global events such as

* calendar cell clicks.

_initEvents: function() {

// internalize

var self = this;

// handle calendar cell click events

this.$el.on('click.calendar', 'div.ci-row > div', function() {

var $cell = $(this),

idx = $cell.index(),

$content = $cell.children('div'),

dateProp = {

day: $cell.children('span.ci-date').text(),

month: self.month + 1,

monthname: self.options.abbr_months ? self.options._months[self.month] : self.options.months[self.month],

year: self.year,

weekday: idx + self.options.start_day - 2,

weekdayname: self.options.days[idx + self.options.start_day - 2]

};

if(dateProp.day) {

self.options.dateClick($cell, $content, dateProp);

}

});

* _generate

* Generates a fresh view of the calendar

* based on the current year and month.

* @param callback

* @return dom

_generate: function(callback) {

var head = this._getHead(),

body = this._getDays(),

rowClass;

switch(this.rowTotal) {

case 4 : rowClass = 'cal-rows-four'; break;

case 5 : rowClass = 'cal-rows-five'; break;

case 6 : rowClass = 'cal-rows-six'; break;

}

this.$cal = $('<div class="ci-calendar ' + rowClass + '">').append(head, body);

this.$el.find('div.ci-calendar').remove().end().append(this.$cal);

if(callback) {

callback.call();

}

* _getHead

* Generates the weekday strings in the header

* of the calendar. Order of weekdays is based

* on the options.start_day parameter.

* @return html

_getHead: function() {

var html = '<div class="ci-head">';

for(var i = 0; i <= 6; i++) {

var pos = i + this.options.start_day,

j = pos > 6 ? pos - 6 - 1 : pos;

html += '<div>';

html += this.options.abbr_days ? this.options._days[j] : this.options._days[j];

html += '</div>';

}

html += '</div>';

return html;

* _getDays

* Generates the rest of the calendar.

* Creates 6 rows, each containing 7 cells.

* Cross-checks which day the month starts

* and ends on and fills the cells accordingly.

* @return html

_getDays: function() {

var d = new Date(this.year, this.month + 1, 0),

monthLength = d.getDate(),

firstDay = new Date(this.year, this.month, 1);

// get the starting dat of the month

this.startingDay = firstDay.getDay();

// start creating the html output for the calendar cells

var html = '<div class="ci-body" data-month="' + (this.month + 1) + '"><div class="ci-row" data-week="1">',

day = 1;

// loop through the weekdays

for(var i = 0; i < 7; i++) {

// add containers for events

for(var k = 0; k < 2; k++) {

html += '<span class="ci-event-row" data-event-row="' + (k+1) + '"></span>';

}

// loop through week rows

for(var j = 0; j <= 6; j++) {

var pos = this.startingDay - this.options.start_day,

p = pos < 0 ? 6 + pos + 1 : pos,

inner = '',

today = this.month === this.today.getMonth() && this.year === this.today.getFullYear() && day === this.today.getDate(),

content = '';

if(day <= monthLength && (i > 0 || j >= p)) {

html += '<div class="' + cellClasses + '" data-month="' + (this.month + 1) + '" data-day="' + day + '" data-events="0">';

inner += '<span class="ci-date">' + day + '</span>';

var strdate = (this.month + 1 < 10 ? '0' + (this.month + 1) : this.month + 1) + '-' + (day < 10 ? '0' + day : day) + '-' + this.year,

dayData = this.data[strdate];

if(dayData) {

content = dayData;

}

if(content !== '') {

inner += '<div class="empty">' + content + '</div>';

}

++day;

}else{

html += '<div class="empty">';

today = false;

}

var cellClasses = today ? 'ci-today ' : '';

if(content !== '') {

cellClasses += 'ci-content ';

}

html += inner;

html += '</div>';

}

if(day > monthLength) {

this.rowTotal = i + 1;

break;

}else{

html += '</div><div class="ci-row" data-week="' + (i+2) + '">';

}

html += '</div></div>';

return html;

* _isValidDate

* Referenced from http://stackoverflow.com/a/8390325/989439

* Let's make sure the date being passed through is valid.

* Checks day values, month values, leap years, etc.

* @param date

* @return array

_isValidDate: function(date) {

// change date to 'MMDDYYYY' format

date = date.replace(/-/gi, '');

// seperate the date string into vars

var month = parseInt(date.substr(0, 2), 10),

day = parseInt(date.substr(2, 4), 10),

year = parseInt(date.substr(4, 8), 10);

// is the month between 1 and 12?

if((month < 1) || (month > 12)) {

return false;

// is the dat between 1 and 31?

}else if((day < 1) || (day > 31)) {

return false;

// there are only 30 days in April, June, September, and November

}else if(((month == 4) || (month == 6) || (month == 9) || (month == 11)) && (day > 30)) {

return false;

// check for leap years

}else if((month == 2) && (((year % 400) == 0) || ((year % 4) == 0)) && ((year % 100) != 0) && (day > 29)) {

return false;

// double check for leap years

}else if((month == 2) && ((year % 100) == 0) && (day > 29)) {

return false;

}

return {

day: day,

month: month,

year: year

};

* _clearEvents

* Move the calendar between months and years.

* The movement is based on the period and dir

* values that are passed into the function.

* Period values can be either 'month' or 'year'

* and the Dir values 'previous' or 'next'.

_clearEvents: function() {

$('.ci-event').remove();

$('.ci-row > div').attr('data-events', 0);

* _updateEvents

* Move the calendar between months and years.

* The movement is based on the period and dir

* values that are passed into the function.

* Period values can be either 'month' or 'year'

* and the Dir values 'previous' or 'next'.

* @param array

_updateEvents: function(_events) {

this._clearEvents();

// console.log(_events);

// calculate the number of days between

// two supplied dates in mm/dd/yyyy format

Date.prototype.diffDates = function() {

var mill = 24 * 60 * 60 * 1000,

diff = arguments[0] - this,

days = Math.floor(diff/mill);

return days; // add 1 to include the first day

}

// loop through each event supplied in

// the _events object when the function is called

$.each(_events, function(index, _event) {

// define the dom elements we'll need

var $_event_start_day = $('.ci-row > div[data-day="' + _event.start['day'] + '"]'),

$_event_finish_day = $('.ci-row > div[data-day="' + _event.end['day'] + '"]'),

$_event_start_week = $_event_start_day.parent(),

$_event_finish_week = $_event_finish_day.parent(),

$_event_start_cells = new Array(),

$_event_finish_cells = new Array();

// define the start date, end date, and number days between them

var _dateStart = new Date(_event.start['month'] + '/' + _event.start['day'] + '/' + _event.start['year']),

_dateFinish = new Date(_event.end['month'] + '/' + _event.end['day'] + '/' + _event.end['year']),

_startPos = $_event_start_day.index() - 1,

_finishPos = $_event_finish_day.index() - 1,

_totalDays = _dateStart.diffDates(_dateFinish);

// define the widths of needed elements

var _blockWidth = Math.floor($('.ci-row > div').width()), // width of each day in pixels

_eventWidth = _blockWidth * _totalDays, // total width of the event in pixels

_eventHeight = Math.floor(($('.ci-event-row').outerHeight() / 2) - 4.5), // get the events height

_daysWidth = _blockWidth * 7, // total width of the calendar in pixels

_eventOffset = _startPos * _blockWidth - _blockWidth,

_eventTotals = _eventWidth + _eventOffset,

_eventLeftover = _eventTotals - _daysWidth;

$_event_start_day.addClass('start');

// make sure the event matches the currently

// viewed year and month before appending to calendar

if(_event.start['year'] == calendar.year && _event.start['month'] == calendar.month + 1) {

for(var i = _event.start['day']; i <= _event.end['day']; i++){

var j = $('.ci-row > div[data-day="' + i + '"]').attr('data-events');

j++;

$('.ci-row > div[data-day="' + i + '"]').attr('data-events', j);

}

if(_eventTotals > _daysWidth) {

// this event is long and will carry into the next row

$_event_start_week.find('.ci-event-row').each(function(i, el) {

$_event_start_cells.push(el);

});

$_event_finish_week.find('.ci-event-row').each(function(i, el) {

$_event_finish_cells.push(el);

});

var _eventDifference = _eventTotals - _daysWidth,

_eventToDraw = _eventTotals - _eventOffset - _eventDifference;

var html_one = '<span class="ci-event private';

html_one += '" style="left:' + (_eventOffset + 6) + 'px;';

html_one += 'width:' + (_eventToDraw - _eventHeight - 3) + 'px;">';

html_one += '<span class="end-cap" style="';

html_one += 'right:-' + Math.floor(_eventHeight/1.5) + 'px; border-width: ' + _eventHeight + 'px 0px ' + _eventHeight + 'px ' + Math.floor(_eventHeight / 1.5) + 'px;';

html_one += '"></span>';

html_one += '<span class="end-cap-border" style="';

html_one += 'right:-' + Math.floor((_eventHeight/1.5) + 2) + 'px; border-width: ' + (_eventHeight + 2) + 'px 0px ' + (_eventHeight + 2) + 'px ' + Math.floor((_eventHeight / 1.5) + 2) + 'px;';

html_one += '"></span>';

html_one += '<label>' + _event.details['title'] + '<br>starts: ' + _event.start['month'] + '/' + _event.start['day'] + ', ends: ' + _event.end['month'] + '/' + _event.end['day'] + '...</label>';

html_one += '</span>';

if($_event_start_day.attr('data-events') <= 1) {

$($_event_start_cells[0]).append(html_one);

}else if($_event_start_day.attr('data-events') >= 1) {

$($_event_start_cells[1]).append(html_one);

}else if($_event_start_day.attr('data-events') > 1) {

console.log('view more');

}

if(_event.end['month'] === _event.start['month']) {

var html_two = '<span class="ci-event private';

html_two += '" style="left:' + (_eventHeight + 6) + 'px;';

html_two += 'width:' + ((_eventDifference - _eventHeight + _blockWidth) - 9) + 'px;">';

html_two += '<span class="start-cap" style="';

html_two += 'left:-' + Math.floor(_eventHeight/1.5) + 'px; border-width: ' + _eventHeight + 'px ' + Math.floor(_eventHeight / 1.5) + 'px ' + _eventHeight + 'px 0px;';

html_two += '"></span>';

html_two += '<span class="start-cap-border" style="';

html_two += 'left:-' + Math.floor((_eventHeight/1.5) + 2) + 'px; border-width: ' + (_eventHeight + 2) + 'px ' + Math.floor((_eventHeight / 1.5) + 2) + 'px ' + (_eventHeight + 2) + 'px 0px;';

html_two += '"></span>';

html_two += '<label>...' + _event.details['title'] + '<br>starts: ' + _event.start['month'] + '/' + _event.start['day'] + ', ends: ' + _event.end['month'] + '/' + _event.end['day'] + '</label>';

html_two += '</span>';

if($_event_start_day.attr('data-events') <= 1) {

$($_event_finish_cells[0]).append(html_two);

}else if($_event_start_day.attr('data-events') >= 1) {

$($_event_finish_cells[1]).append(html_two);

}else if($_event_start_day.attr('data-events') > 1) {

console.log('view more');

}

}else{

// this event fits within its starting row

$_event_start_week.find('.ci-event-row').each(function(i, el) {

$_event_start_cells.push(el);

});

var html = '<span class="ci-event public';

html += '" style="left:' + (_eventOffset + 6) + 'px;';

if(_event.start['month'] != _event.end['month']) {

html += 'width:' + (_eventWidth - _eventHeight + _blockWidth - 5) + 'px;">';

html += '<span class="end-cap" style="';

html += 'right:-' + Math.floor(_eventHeight/1.5) + 'px; border-width: ' + _eventHeight + 'px 0px ' + _eventHeight + 'px ' + Math.floor(_eventHeight / 1.5) + 'px;';

html += '"></span>';

html += '<span class="end-cap-border" style="';

html += 'right:-' + Math.floor((_eventHeight/1.5) + 2) + 'px; border-width: ' + (_eventHeight + 2) + 'px 0px ' + (_eventHeight + 2) + 'px ' + Math.floor((_eventHeight / 1.5) + 2) + 'px;';

html += '"></span>';

}else{

html += 'width:' + (_eventWidth + _blockWidth - 5) + 'px;">';

}

html += '<label>' + _event.details['title'] + '<br>starts: ' + _event.start['month'] + '/' + _event.start['day'] + ', ends: ' + _event.end['month'] + '/' + _event.end['day'] + '</label>';

html += '</span>';

if($_event_start_day.attr('data-events') <= 1) {

$($_event_start_cells[0]).append(html);

}else if($_event_start_day.attr('data-events') >= 1) {

$($_event_start_cells[1]).append(html);

}else if($_event_start_day.attr('data-events') > 1) {

console.log('view more');

}

}else if(_event.end['year'] == calendar.year && _event.end['month'] == calendar.month + 1) {

// this event is being carried over from the previous month

$_event_finish_week.find('.ci-event-row').each(function(i, el) {

$_event_finish_cells.push(el);

});

var _newStartPos = _finishPos - _totalDays > 1 ? _finishPos - _totalDays : 1,

_newStartPos = _newStartPos * _blockWidth - _blockWidth,

_newEventWidth = _blockWidth * _finishPos - _blockWidth;

var html = '<span class="ci-event public';

html += '" style="left:' + (_newStartPos + _eventHeight + 6) + 'px;';

html += 'width:' + ((_newEventWidth - _eventHeight) - 5) + 'px;">';

html += '<span class="start-cap" style="';

html += 'left:-' + Math.floor(_eventHeight/1.5) + 'px; border-width: ' + _eventHeight + 'px ' + Math.floor(_eventHeight / 1.5) + 'px ' + _eventHeight + 'px 0px;';

html += '"></span>';

html += '<span class="start-cap-border" style="';

html += 'left:-' + Math.floor((_eventHeight/1.5) + 2) + 'px; border-width: ' + (_eventHeight + 2) + 'px ' + Math.floor((_eventHeight / 1.5) + 2) + 'px ' + (_eventHeight + 2) + 'px 0px;';

html += '"></span>';

html += '<label>' + _event.details['title'] + '<br>starts: ' + _event.start['month'] + '/' + _event.start['day'] + ', ends: ' + _event.end['month'] + '/' + _event.end['day'] + '</label>';

html += '</span>';

$($_event_finish_cells[0]).append(html);

}

});

* _move

* Move the calendar between months and years.

* The movement is based on the period and dir

* values that are passed into the function.

* Period values can be either 'month' or 'year'

* and the Dir values 'previous' or 'next'.

* @param period

* @param dir

* @param callback

_move: function(period, dir, callback) {

// take a step back

if(dir === 'previous') {

// go back a month

if(period === 'month') {

if(this.month > 0) {

this.month = --this.month;

}else{

this.month = 11;

this.year = --this.year;

}

// go back a year

}else if(period === 'year') {

this.year = --this.year;

}

// put your best foot forward

}else if(dir === 'next') {

// go forward a month

if(period === 'month') {

if(this.month < 11) {

this.month = ++this.month;

}else{

this.month = 0;

this.year = ++this.year;

}

// go forward a year

}else if(period === 'year') {

this.year = ++this.year;

}

this._generate(callback);

* _getYear

* Return the current calendar year

* @return int

_getYear: function() {

return this.year;

* _getMonth

* Return the current calendar month

* @return int

_getMonth: function() {

return this.month + 1;

_getNextMonth: function() {

var next_month = this.month;

if(next_month < 11) {

next_month = ++next_month;

}else{

next_month = 0;

}

return this.options.abbr_months ? this.options._months[next_month] : this.options.months[next_month];

_getLastMonth: function() {

var last_month = this.month;

if(last_month > 0) {

last_month = --last_month;

}else{

last_month = 11;

}

return this.options.abbr_months ? this.options._months[last_month] : this.options.months[last_month];

* _getMonthName

* Return the current calendar month

* as a string value. Output will be

* determined based on abbreviations

* being enabled or disabled.

* @return string

_getMonthName: function() {

return this.options.abbr_months ? this.options._months[this.month] : this.options.months[this.month];

_getCell: function(day) {

var row = Math.floor((day + this.startingDay - this.options.start_day) / 7),

pos = day + this.startingDay - this.options.start_day - (row * 7) - 1;

return this.$cal.find('div.ci-body').children('div.ci-row').eq(row).children('div').eq(pos).children('div');

_setData: function(data) {

data = data || {};

$.extend(this.data, data);

this._generate();

* _gotoNow

* Update the month and year values

* to the current date then regenerate

* the calendar view.

* @param callback

_gotoNow: function(callback) {

this.month = this.today.getMonth();

this.year = this.today.getFullYear();

this._generate(callback);

* _gotoDate

* Update the calendar to display a

* specific month and year based on

* the passed values.

* @param month

* @param year

* @param callback

_gotoDate: function(month, year, callback) {

this.month = month;

this.year = year;

this._generate(callback);

* _gotoNextMonth

* Move the current calendar view

* to the upcoming month and then

* regenerate the view.

* @param callback

_gotoNextMonth: function(callback) {

this._move('month', 'next', callback);

* _gotoPreviousMonth

* Move the current calendar view

* to the previous month and then

* regenerate the view.

* @param callback

_gotoPreviousMonth: function(callback) {

this._move('month', 'previous', callback);

* _gotoNextYear

* Move the current calendar view

* to the upcoming year and then

* regenerate the view.

* @param callback

_gotoNextYear: function(callback) {

this._move('year', 'next', callback);

* _gotoPreviousYear

* Move the current calendar view

* to the previous year and then

* regenerate the view.

* @param callback

_gotoPreviousYear: function(callback) {

this._move('year', 'previous', callback);

}

};

* _errors

* Basic error logging. Passed errors

* are logged through the browser console.

* @param message

* @return error

var _errors = function(message) {

if(window.console) {

window.console.error(message);

}

};

* ciCalendar

* @param options

* @return instance

$.fn.ciCalendar = function(options) {

// begin a new instance of the calendar

var instance = $.data(this, 'ciCalendar');

// if the options being passed into the calendar

// are in string format, let's go ahead and split

// it up into a nice shiny array

if(typeof options == 'string') {

// shiny new array of arguments

var args = Array.prototype.slice.call(arguments, 1);

// loop the arguments

this.each(function() {

if(!instance) {

_errors('cannot call methods on the calendar prior to initialization. ' +

'attempted to call method "' + options + '"');

return;

}

if(!$.isFunction(instance[options]) || options.charAt(0) === '_') {

_errors('no such method "' + options + '" for the calendar instance');

return;

}

// valid arguments passed as options

instance[options].apply(instace, args);

});

}else{

// the options are not being passed as a

// string. let's parse the passed array

// and apply them as options

// loop the arguments

this.each(function() {

if(instance) {

// initialize the existing

// instance that was passed

instance._init();

}else{

// create a new instance

// and initialize it afterward

instance = $.data(this, 'ciCalendar', new $.ciCalendar(options, this));

}

});

}

return instance;

};

})(jQuery, window);

var calendar = $('#calendar').ciCalendar({

dateClick: function($el, $contentEl, dateProperties) {

console.clear();

for(var key in dateProperties) {

console.log(key + ' = ' + dateProperties[key]);

}

}),

$month = $('#month').html(calendar._getMonthName()),

$year = $('#year').html(calendar._getYear()),

$last = $('#last').html(calendar._getLastMonth()),

$next = $('#next').html(calendar._getNextMonth());

var events = [

event = {

details: {

title: 'This is a longer event that breaks into a new row!',

location: 'expo center',

country: 'united states',

city: 'san diego',

public: true

start: {

time: '12:00pm',

month: 7,

day: 17,

year: 2019,

end: {

time: '12:00pm',

month: 7,

day: 26,

year: 2019,

}

event = {

details: {

title: 'An event that shares days as another event',

location: 'expo center',

country: 'united states',

city: 'san diego',

public: true

start: {

time: '12:00pm',

month: 7,

day: 20,

year: 2019,

end: {

time: '12:00pm',

month: 7,

day: 23,

year: 2019,

}

event = {

details: {

title: 'This is a shorter single row event!',

location: 'expo center',

country: 'united states',

city: 'san diego',

public: true

start: {

time: '12:00pm',

month: 8,

day: 1,

year: 2019,

end: {

time: '12:00pm',

month: 8,

day: 3,

year: 2019,

}

event = {

details: {

title: 'Another short event sharing days',

location: 'expo center',

country: 'united states',

city: 'san diego',

public: true

start: {

time: '12:00pm',

month: 8,

day: 2,

year: 2019,

end: {

time: '12:00pm',

month: 8,

day: 5,

year: 2019,

}

];

calendar._updateEvents(events);

$last.on('click', function() {

calendar._gotoPreviousMonth(updateMonthYear);

});

$next.on('click', function() {

calendar._gotoNextMonth(updateMonthYear);

});

$(window).on('resize', function() {

calendar._updateEvents(events);

});

function updateMonthYear() {

$month.html(calendar._getMonthName());

$year.html(calendar._getYear());

$next.html(calendar._getNextMonth());

$last.html(calendar._getLastMonth());

calendar._updateEvents(events);

}

That’s It. Now you have successfully created jQuery Dynamic Calendar Program With CSS, Basic jQuery Calendar. If you have any doubt or question comment down below.

Thanks For Visiting, Keep Visiting.

1 COMMENT

J May 11, 2022 At 9:46 am

Hi Any tutorial or example of how to use it? E.g. Adding events

Reply

jQuery Dynamic Calendar Program With CSS | Basic jQuery Calendar

Preview Of Basic Calendar UI

jQuery Dynamic Calendar Source Code

1 COMMENT

LEAVE A REPLY Cancel reply

EVEN MORE NEWS

Free PHP, HTML, CSS, JavaScript/TypeScript editor – CodeLobster IDE

Unique Uses for Blockchain Technology

JavaScript Progress Clock | Day, Hour, Minute, Second, Progression

POPULAR CATEGORY