The game, also previously announced, will still be televised nationally by Fox Sports Net.
The change came about after Colorado's and the Big 12's television network partners re-examined an earlier but tentative decision to allow the game to be televised inside an exclusive ABC telecast window.
ABC has only one time slot for a Big 12 Conference game that day, and has already committed to televising the Oklahoma-Texas game in its afternoon window (1:30 p.m. MDT). The kickoff adjustment allows the Colorado-Georgia game to be televised in the later prime time window and afford ABC its full exclusivity in the afternoon.

http://accesswdun.com/article/2010/8/231382