Create a Date with a set timezone without using a string representation

Question

I have a web page with three dropdowns for day, month and year. If I use the JavaScript Date constructor that takes numbers, then I get a Date obje

Answer 1

d = new Date();
utc = d.getTime() + (d.getTimezoneOffset() * 60000);
nd = new Date(utc + (3600000*offset));

offset value base on which location time zone you would like to set 
For India offset value +5.5,
New York offset value -4,
London offset value +1

for all location offset Wiki List of UTC time offsets