RE: [PHP] time

[snip] I am writing a program for managing leads and contacts. I would like to add the ability to see what TIME it is where the contact is not there server time. So if you looked at a list of contacts from all over the country you would see different times compared to what time it is where the user is at. What should I be looking at to calculate out the different time zones. Could somebody just point me in the write direction at this time I have no idea on how to proceeded. [/snip] You would use JavaScript to capture their local 'browser' time and process it with PHP I am not looking for something where I am on line with these people some do not have internet access. I would be calling them on the phone. I need a way to get the time at there location using what info I already have like the address zip code and phone number. It would probably have to be compared to a database of some sort or the time zone file on a lynx server.