UTC
By default, Day.js parses and displays in local time.
If you want to parse or display a date-time in UTC, you can use dayjs.utc() instead of dayjs().
While in UTC mode, all display methods will display in UTC time instead of local time.
This requires the
UTC
plugin to work
dayjs.extend(utc)
// default local time
dayjs().format() //2019-03-06T08:00:00+08:00
// UTC mode
dayjs.utc().format() // 2019-03-06T00:00:00Z
Additionally, while in UTC mode, all getters and setters will internally use the Date#getUTC* and Date#setUTC* methods instead of the Date#get* and Date#set* methods.
dayjs.utc().seconds(30).valueOf()// => new Date().setUTCSeconds(30)
dayjs.utc().seconds()// => new Date().getUTCSeconds()
To switch from UTC to local time, you can use dayjs#utc or dayjs#local.