The accepted 'normal' amount is eight hours. However - everyone is different. I, personally, only need around six hours sleep. I'm never asleep before 1am and always awake again by 7am.
The best answer I can give being in a similar, albeit webased industry, is an approximation at best. Given you mean on network TV only, and based on consumer brand advertisments, you average 15 minutes of commericals per episode from 5am to 1am the following day. After that it is anyones guess, as most of the shows after 1am are infomercials. That being said, approximately 20 hours of broadcasting @ an average of 15 minutes gives us about 5.25 hours of standard commercials. Add the remaining 4 hours of infomercials, you then have 9.25 hours of commercial broadcasting per day on average network TV.
April 7th 2012 at 8 PM (US time) 1am UK time
yes 1am
1am on the calendar day 2 ahead. So 28 hours after 9pm on Sunday is 1am on Tuesday.
At 1am
1am
17
6
1am
1am
California is 3 hours behind Boston. 1am in Boston today (Friday) = 10pm in California yesterday (Thursday).
Yes - there is a sleep inducing hormone called melatonin and adults normally release it at 10pm, whereas teenagers release it at 1am! Read more in related links.
From 8am to 1pm is 5 hours. From 8am to 1am is 17 hours. From 8pm to 1am is 5 hours. From 8pm to 1pm is 17 hours.