I'm not 100% sure what time but in the past it has been around midnight?
I know I will be on for the whole day though.
The first few games I will be playing solo then I will play with randoms or people on my friends list. If you are on my friends list don't get mad though if I don't join. I'm just trying to find other players to add on my friends list. DLC release is the best time to find them IMO.
It comes out at the same time everywhere just depends on the area you are in, at 2 am pst it is 5 am est
and thats when I've downloaded both of the dlc maps, I haven't seen them on before that time on ps3
if any one wants to play im gagserdan1234 spelled that way exactly just add me on psn and ill play