If I set my sales in SalesMaker with an end date of April 1, 2009. Does that mean that the sales will end at midnight at the end of the March 31st day? Or does it mean that sales will end at end-of-day on April 1, 2009.

I believe the "clock" that is ZenCart using is the clock that I see at the top of the admin pages which shows "Tue, 31 Mar 2009 15:40:54 -0700GMT".

I don't understand how ZenCart is getting that time? Is that the time of the webhost server? And where can I adjust this time for my timezone?