Hello how may I help you? I'm seeking some strange time zone information. Sure! I will try to help you with that. Basically is there a simple explanation how they work? I am unable to offer information on how time zone's work. My function is to only calculate times in different time zones. Do you know why they are needed? I am unable to provide information on how time zones work. Do you know who establishes where the different time zones are located? I am unable to provide information on how time zones work. OK, I think I'll ask my local librarian. She seems to know alot about stuff. Thank you. Do you have any further questions? No that's it. Thanks anyway.