How to get time zone?

[mshen]

I want to get the time zone when a client visit my site.Please let me know how to get it with php or javascript?

I can get the broswer information with javascript.May I get the time zone with it?

Thanks

[planetsim]

Only that i know of is to ask the person in a form. Otherwise its not possible. Unless you try javascript, yet if it does work it wont be accurate.