[quote name='jast']I do not believe this is true and here is why. When watching TV, during commercials/advertisement of shows/series, you are given two different times for when it will be shown (i.e 10/9 Central). So while being aired at 9 Central, elsewhere it is being aired at a different time due to the time zone. Feel free to correct me if I am absolutely wrong.
I don't think I quite understand your post, however. When you say "the only things that happen at the same time" you've lost me. Virtually, everything is happening at the same time. The only difference are our times due to time zones. Even during live broadcasts. Everyone will see it, but not everyone will be watching at the same hour. I did some quick researching and only discovered what I already suspected. Everything is being shown at the same time, but at a different hour.[/quote]
OK... first off, what he meant by "happening at the same time" is that live events, such as sports, is broadcast live. This would be 3 different broadcast times. i.e. Notre Dame vs USC kicked off at 5pm PST which is 8pm EST. Happening at one instance, but being broadcast at different times based on time zone.
With that said, the first thing you mentioned seems a bit off. Something that is broadcast a 10/9 Central will be broadcast at 10pm local time EST as well as 10pm local time PST. It will air at 9pm CST.
This is not a time zone issue. This is a demographic issue.
The networks intentionally broadcast earlier in the Central time zone based on statistics telling them that people tend to turn in earlier. You have to catch those viewers to make your advertisers happy.
For example, my DirecTV is set to EST broadcast, while my parents is set to PST broadcast. I can go to my parents house 3 hours later and watch the exact same show with the exception of live events or local channels.
As such, the first code broadcast at 11am EST was the same code broadcast at 11am CST as well as the same one broadcast at 11am PST.