Add offset to UTC date in Javascript

Question

I have UTC date and want to add offset say 330 minutes to it.

var now = new Date(); 
var now_utc = new Date(now.getUTCFullYear(), now.getUTCMonth(), now.getUTCDate(),  now.getUTCHours(), now.getUTCMinutes(), now.getUTCSeconds());
var offset = 330;

var new_date = ????

Answer 1

new_date = new Date((now_utc * 1) + (330*60*1000))