How to get Australia Sydney timezone offset in javascript nodejs

Question

Austalia/Sydney timezone offset (UTC to AEST difference) is +10:00 (from April first Sunday) and +11:00 (from April first Sunday) (from October first Sunday).

There is a 600 minute or 660 minute difference.

In javascript/nodejs/momentjs, how can I retrieve the time difference? Regardless of server time?

Answer 1

It is very easy with Moment JS. You can try different options from the docs.

var Apr = moment("2020-04-05").tz("Australia/Sydney").format('Z');
var Oct = moment("2020-10-04").tz("Australia/Sydney").format('Z');
    
console.log("Difference from April first Sunday",Apr);
console.log("Difference from October first Sunday",Oct);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.10.6/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment-timezone/0.4.1/moment-timezone-with-data-2010-2020.min.js"></script>