Detect timezone in javascript

Detect timezone in javascript

For now I'm working on a project, I need to display the value of date on screen. The value I received , I get it as datetime in UTC value. I need to display as local timezone.

var time_value = 1391187600000;

I check the current timezone by use this method getTimezoneOffset

It is a method of object date in javascript, it return number of minutes different from UTC.

This is what I use

var hplus = ((new Date().getTimezoneOffset()) / 60) * -1);

if (isNaN(hplus)) hplus = 0;

explanation:

new Date()

• Need to use method of object date, then create one

new Date().getTimezoneOffset()

• Receive -420 (minutes) from this method

(new Date().getTimezoneOffset()) / 60

• Need hour so I divided it by 60, in my sample I will get 7

(((new Date().getTimezoneOffset()) / 60) * -1)

• As I received UTC, to display I will add 7 to UTC hour, I prefer to get +7
• If you are at Arizona in USA, you will received -7