When prime time isThe generally accepted times considered to be traditional prime time are 8:01 p.m. to 11:00 p.m.Eastern and Pacific and 7:00 p.m. to 10:00 p.m. Central and Mountain Monday–Saturday.
* On Sundays, prime time begins an hour earlier, at 7:00 p.m. Eastern and Pacific and 6:00 p.m. Central and Mountain, ending at the same time as on the other six days of the week. Note that for cable networks, such as USA, TBS, and ABC Family, prime time is 8:00 p.m. to 11:00 p.m. all seven days of the week.
* With the addition of newer networks such as FOX, The CW, and MyNetworkTV, they're now considered a common prime separate from traditional prime. Common prime is 8:00 p.m. to 10:00 p.m. Eastern and Pacific and 7:00 p.m. to 9:00 p.m. Central and Mountain Monday–Saturday, beginning an hour earlier on Sundays as with traditional prime.
* Before the FCC regulated time slots prior to prime time in the early 1970s, networks began programming at 7:30 on weeknights. For a historical look at prime time, see History of TV Prime Time
http://en.wikipedia.org/wiki/PrimetimeSee ya at tonights "Primetime" Wednesday Night Snapshot 10PM EST