在 JS [UTC+2、UTC+3、UTC-12 等] 中使用数值设置 UTC 时区

Question

How can I create a date with a specific timezone like that [UTC+2, UTC+3, UTC-12, etc] but not with string like that 'America/New York' in js/moment.js? I have a list of all timezones from server in this format [UTC+2, UTC+3, UTC-12, etc], so I need to create dates with a choosen timezone. I tried to use moment.js but it accepts only strings formate. Thanks ahed!

Answer 1

I tried to use moment.js but...

Didn't you come accross those methods: .utc() , .add() and .format() ?

EDIT

To accomodate non-full hour offsets, you can use .match to retreive the sign (+ or -) of the offset, the hour and the optionnal minute.

Here is the actual possible offsets list:Wikipedia

It outputs UTC time if your offset only is UTC or is an empty string.

 const timeOffsets = ["UTC+2", "UTC+3", "UTC-12", "UTC+5:45", "UTC-3:30", "UTC", ""] function getlocalTime(offset) { const time = offset.match(/([\+\-])(\d{1,2}):?(\d{2})?/) let sign = "" let numericOffset = 0 if (time) { sign = time[1] numericOffset = parseInt(time[2]) + (time[3] ? parseInt(time[3]) / 60 : 0) } return moment().utc().add(sign + numericOffset, "hours").format("YYYY-MM-DD HH:mm:ss") } const result = timeOffsets.map(getlocalTime) console.log(result)

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