I’ll introduce a snippet for changing the timezone of Date type to JST using moment.js, a JavaScript date handling library.

var currentDate = new Date();
var timezone = "Asia/Tokyo";
var currentDateJst = moment(currentDate).tz(timezone).format('YYYY/MM/DD HH:mm:ss');

Reference Information

• Timezone Offset - Moment.js | Documentation

That’s all from the Gemba.