JAVASCRIPT

get timezone javascript

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

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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javascript date to local timezone

// Get new Date
let date = new Date()

//Convert it to local Time
date.toLocaleTimeString()