Daylight Savings Time

With clocks being turned back in ares that obverse daylight savings time, and the servers having recently changed thier location in the country, I'm wondering what affects, if any, will it have on times that in game events happen, like sieges?

Well for one thing, Daylight Savings Time in the spring pushes the clocks one hour forward. So I assume that sieges will still take place at 8 PM CST, however in areas that do not observe Daylight Savings Time it will be an hour later.

and the servers having recently changed thier location in the country

The servers didn't change the main office did. So being the main office which was PST and is now CST, they had to change times.