When do games become available?

Hi, i was wondering when the games actually become available. for example, if a game is coming out april the 29th, then is it available for requesting/offering at 12:00am april 29th? because i tried this once, and it was available at 12:00am, but i tried it again for another game and it wasnt available at 12:00. i gave up waiting and i checked again at like 7:30 and it was available. but does anyone know the exact times these games become available, and why it is different than before?

In the past, games have always become available at midnight CST the day they're released. Maybe daylight savings time threw this off between the two attempts you made?

I think Madfigs nailed it with the daylight savings time reasoning.  In this thread, ShadowMasterX confirms the 1 am timing of new releases.

 So basically, you can begin to request the games from 1:00 am on the day of release? and thanks for the responses guys!

Or the day of release, according to Muse.  Sometimes they get the dates wrong, so don't necessarily go by official streetdate.