JavaScript -- get current date using UTC offset

Question

How can I get the current date based on UTC Offset? For example, the UTC Offset for Australia is UTC +10:00 where it is already May 24th.

I can get UTC date and hour but can't find any Date methods that factor in UTC Offset.

Answer 1

Once you have the offset (in this case 10 hours) use this function:

function getDateWithUTCOffset(inputTzOffset){
    var now = new Date(); // get the current time

    var currentTzOffset = -now.getTimezoneOffset() / 60 // in hours, i.e. -4 in NY
    var deltaTzOffset = inputTzOffset - currentTzOffset; // timezone diff

    var nowTimestamp = now.getTime(); // get the number of milliseconds since unix epoch 
    var deltaTzOffsetMilli = deltaTzOffset * 1000 * 60 * 60; // convert hours to milliseconds (tzOffsetMilli*1000*60*60)
    var outputDate = new Date(nowTimestamp + deltaTzOffsetMilli) // your new Date object with the timezone offset applied.

    return outputDate;
}

In your case you would use:

var timeInAustralia = getDateWithUTCOffset(10);

This will return a Date object. You still need to format the date to your liking.

I agree with @Frax, Moment is a great library if you don't mind adding additional dependencies to your project.

Good luck