parseDate.js

var parseDate = (function () {
	// test if `valueOf()` returns as UTC or Local time
	var isUTCTime = ((new Date(Date._parse('2015-03-23T00:00:00'))).valueOf() === (new Date(Date.UTC(2015, 2, 23, 0, 0, 0))).valueOf());
	
	// chrome, safari and opera return UTC time so we need to convert it to Local time
	function utcDate (str) {
		var date = localDate(str);
		return new Date(date.valueOf() + (date.getTimezoneOffset() * 60000));
	}
	
	// firefox and IE/edge return Local time and this can be used directly
	function localDate (str) {
		return new Date(Date._parse(str));
	}
	
	// return the correct date parsing function to populate `parseData`
	return isUTCTime ? utcDate : localDate;
}());