UTC

This returns a Day.js object with a flag to use UTC time.

TIP

This requires the UTC plugin to work

dayjs.extend(utc);

var a = dayjs();
a.format(); //2019-03-06T08:00:00+08:00
a.utc().format(); // 2019-03-06T00:00:00Z

Passing true will change the time zone without changing the current time.

dayjs('2016-05-03 22:15:01').utc(true).format()
// 2016-05-03T22:15:01Z

Check more information about UTC mode.

UTC ​