<div class="container">
  <div class="row">
    Date formats: yyyy-mm-dd, yyyymmdd, dd-mm-yyyy, dd/mm/yyyy, ddmmyyyyy
  </div>
  <br />
    <div class="row">
        <div class='col-sm-3'>
            <div class="form-group">
                <div class='input-group date' id='datetimepicker1'>
                    <input type='text' class="form-control" />
                    <span class="input-group-addon"><span class="glyphicon glyphicon-calendar"></span>
                    </span>
                </div>
            </div>
        </div>
    </div>
</div>
 $(function () {
   var bindDatePicker = function() {
		$(".date").datetimepicker({
        format:'YYYY-MM-DD',
			icons: {
				time: "fa fa-clock-o",
				date: "fa fa-calendar",
				up: "fa fa-arrow-up",
				down: "fa fa-arrow-down"
			}
		}).find('input:first').on("blur",function () {
			// check if the date is correct. We can accept dd-mm-yyyy and yyyy-mm-dd.
			// update the format if it's yyyy-mm-dd
			var date = parseDate($(this).val());

			if (! isValidDate(date)) {
				//create date based on momentjs (we have that)
				date = moment().format('YYYY-MM-DD');
			}

			$(this).val(date);
		});
	}
   
   var isValidDate = function(value, format) {
		format = format || false;
		// lets parse the date to the best of our knowledge
		if (format) {
			value = parseDate(value);
		}

		var timestamp = Date.parse(value);

		return isNaN(timestamp) == false;
   }
   
   var parseDate = function(value) {
		var m = value.match(/^(\d{1,2})(\/|-)?(\d{1,2})(\/|-)?(\d{4})$/);
		if (m)
			value = m[5] + '-' + ("00" + m[3]).slice(-2) + '-' + ("00" + m[1]).slice(-2);

		return value;
   }
   
   bindDatePicker();
 });

External CSS

  1. https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css
  2. https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datetimepicker/3.1.3/css/bootstrap-datetimepicker.min.css
  3. https://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js
  2. https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js
  3. https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.9.0/moment-with-locales.min.js
  4. https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datetimepicker/3.1.3/js/bootstrap-datetimepicker.min.js