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

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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.

https://webdevtrick.com/wp-content/uploads/jquery-calendar.mp4?_=1

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;

    }

}

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/* 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);

}

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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.

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