var date1 = new Date('2019-04-01'); //2019-03-31 var date2 = new Date('2019/04/01'); // 2019-04-01 date2.setHours('9'); date2.setMinutes('36'); // Mon Apr 01 2019 09:36:00 GMT-0500 (CDT) var date3 = new Date('2019-04-01T12:09:36');