User:Tim Parenti/sandbox/timeshift

Example
To illustrate these points, here is a typical network feed schedule from the evening of Thursday 31 March 2011 for CBS affiliates in each time zone:

Note: Daytime, overnight, and early morning programming is generally a combination of network feeds and locally syndicated programs.

Color Key
 * Prime Time Programming
 * Syndicated Programming
 * Late Night Comedy/Talk
 * News

Summary
This method covers the six time zones with four different broadcast times — the original Eastern/Central broadcast which covers the majority of the U.S. population, a Mountain feed delayed by 1 hour, a Pacific/Alaska feed delayed by 3 hours, and a Hawaii feed delayed by 4 hours. Since Arizona and Hawaii do not observe Daylight Saving Time, network broadcasts are effectively delayed an extra hour within those areas when the rest of the country is observing DST, which increases the number of unique schedules to five. (In actuality, this is because the original broadcasts are an hour earlier.) The boundaries of prime time programming in each time zone and their effective delays from the original East Coast broadcast is summarized in the table below:

Note: The "Big Three" networks generally start their prime time programming one hour earlier, at 7:00pm ET/PT (6:00pm elsewhere), on Sundays.

Example
To illustrate these points, here is a typical network feed schedule from the evening of Tuesday 29 March 2011 for Global stations in each time zone:

Note: While Newfoundland does not have an official Global station, CJON-TV in St. John's is, to some degree, the de facto affiliate in that region in terms of prime time programming. After the end of prime time at 11:30pm NDT, the table above shows what the broadcast schedule would logically look like if an official Global station existed in the region.