Therefore, after the pm2 game (the last game prior to the highlighted transaction deadline notice on your League Office page), you have until 12 am that night to set your roster for the rest of the season. At 12:01 you're done, and whoever's in AAA at the point will stay there. I've forgotten the deadline several times and have mistakingly left a lot of good players in AAA. So make sure you take care of it ASAP.