UUID_to_Date.js

(function( ) {
	var GREGORIAN_OFFSET = 122192928000000000;
	this.UUID_to_Date = {
		get_time_int: function (uuid_str) {
			// (string) uuid_str format	=>		'11111111-2222-#333-4444-555555555555'
			var uuid_arr = uuid_str.split( '-' ),
				time_str = [
					uuid_arr[ 2 ].substring( 1 ),
					uuid_arr[ 1 ],
					uuid_arr[ 0 ]
				].join( '' );
				// time_str is convert  '11111111-2222-#333-4444-555555555555'  to  '333222211111111'
			return parseInt( time_str, 16 );
		},
		get_date_obj: function (uuid_str) {
			// (string) uuid_str format	=>		'11111111-2222-#333-4444-555555555555'
			var int_time = this.get_time_int( uuid_str ) - GREGORIAN_OFFSET,
				int_millisec = Math.floor( int_time / 10000 );
			return new Date( int_millisec );
		}
	};
}).call( this );