Sorry for misunderstanding your problem.
here is the solution of your problem.
const d = date from database;
const localTime = d.getTime();
const localOffset = d.getTimezoneOffset() * 60000;
const utc = localTime + localOffset;
const offset = 8; (destination city’s UTC offset in hours)
const bombay = utc + (3600000*offset);
const nd = new Date(bombay);
console.log(nd.toLocaleString());