JAVASCRIPT

javascript set date to timezone

var d = new Date("2020-04-13T00:00:00.000+08:00"); /* midnight in China on April 13th */
d.toLocaleString('en-US', { timeZone: 'America/New_York' });
//=> "4/12/2020, 12:00:00 PM"
// (midnight in China on April 13th is noon in New York on April 12th)

get timezone javascript

const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
console.log(timezone);

get current time in different timezone javascript

// current datetime string in America/Chicago timezone
let chicago_datetime_str = new Date().toLocaleString("en-US", { timeZone: "America/Chicago" });

// create new Date object
let date_chicago = new Date(chicago_datetime_str);

javascript get specific timezone

function changeTimezone(date, ianatz) {

  // suppose the date is 12:00 UTC
  var invdate = new Date(date.toLocaleString('en-US', {
    timeZone: ianatz
  }));

  // then invdate will be 07:00 in Toronto
  // and the diff is 5 hours
  var diff = date.getTime() - invdate.getTime();

  // so 12:00 in Toronto is 17:00 UTC
  return new Date(date.getTime() - diff); // needs to substract

}

// E.g.
var here = new Date();
var there = changeTimezone(here, "America/Toronto");

console.log(`Here: ${here.toString()}
Toronto: ${there.toString()}`);
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get timezone name from date javascript

Intl.DateTimeFormat().resolvedOptions().timeZone

how to get current time zone in javascript

// how to get current time zone in javascript
const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
console.log(timezone); // Asia/Calcutta

how to see my timezone using js

document.getElementById("time").innerHTML = Date().slice(Date().indexOf("(")+1,Date().lastIndexOf(")"));

timezone using javascript

' check time zone
DateDiff("s", "01/01/1970 00:00:00", Now())