Alright so I\'m using javascript to return the shorthand timezone of the users system time with a simple regex like so
new RegExp(\'\\\\(.*\\\\)\').exec(new
It is implementation dependent, meaning it is operating system and browser dependent, making it not very reliable if you want a consistent result.
If you want to parse it consistently in a specific way your best bet is gonna be to parse it out manually in code or to use a package like datejs or similar.