Looks like you're correct - was 8:20 CT, first of the late-night viewing windows.
2012 NCAA Tournament TV Schedule on CBS, TBS, TNT and TruTV
CBS and Turner Sports released the schedule for games during the first two rounds of the NCAA Tournament on Sunday night. After the First Four on Tuesdaywww.sportsmediawatch.com
For some reason, I swore UK '12 game was late afternoon. (I was uncertain of UConn slot)
I was at a bar for the UK game too. Friends who were Iowa fans and I were loving Royce going coast to coast and then UK said 'nah.