Nodejs Javascript Set Date/Timezone

NODE CONSOLE

process.env.TZ = 'America/New_York';

Date()

Date.now() 
= system time in miliseconds since 1 Jan 1970 UTC

new Date().getHours();

JAVASCRIPT TIMESTAMP

Set timezone in function:
process.env.TZ = 'America/New_York';

Example

ALTERNATIVE
Momentjs Node Module

Reference