definition of Wikipedia
|Eastern Time Zone|
(furthest right yellow)
|Current time ()|
|EDT||12:11 pm on Jun 26, 2012|
|Observance of DST|
|DST is observed throughout this time zone between the 2nd Sunday in March and the 1st Sunday in November.|
|DST began||Mar 11, 2012|
|DST ends||Nov 4, 2012|
The Eastern Time Zone contains 17 states in the eastern part of the Continental United States and is shared by parts of Canada and three countries in South America. These places use Eastern Standard Time (EST) when observing standard time (autumn/winter) - which is 5 hours behind Coordinated Universal Time (UTC−05) - and Eastern Daylight Time (EDT) when observing daylight saving time (spring/summer) - which is 4 hours behind (UTC−04). In the northern parts of the time zone, on the second Sunday in March, at 2:00 am EST, clocks are advanced to 3:00 am EDT leaving a one hour gap; on the first Sunday in November, at 2:00 am EDT, clocks are moved back to 1:00 am EST. Southern parts of the zone (Panama and the Caribbean) do not observe daylight saving.
The 1966 Uniform Time Act in the United States meant that EDT was instituted on the last Sunday in April, starting in 1966. EST would be re-instituted on the last Sunday in October. The act was amended to make the first Sunday in April the beginning of EDT as of 1987. The Energy Policy Act of 2005 extended daylight saving time in the United States beginning in 2007, so that the local time changes at 2:00 am EST to 3:00 am EDT on the second Sunday in March and returns at 2:00 am EDT to 1:00 am EST on the first Sunday in November. In Canada, the time changes as it does in the United States.
In the United States, the District of Columbia along with seventeen states are entirely located within the Eastern Time zone, while another six are split between the Eastern and Central time zones.
The seventeen states which observe only Eastern time are as follows.
These six states are split between Eastern and Central time.
Eastern Time is also used somewhat as a de facto official time for all of the United States, since it includes the capital (Washington, D.C.), the largest city (New York City), and approximately half the country's population. National media organizations will often report when events happened or are scheduled to happen in Eastern Time even if they occurred in another time zone, and TV schedules are also almost always posted in Eastern Time. Major professional sports leagues also post all game times in Eastern time, even if both teams are from the same time zone, outside of Eastern Time. For example a game time between two teams from Pacific Time Zone will still be posted in Eastern time (for example, one may see "Seattle at Los Angeles" with "10:00 pm" posted as the start time for the game, often without even clarifying the time is posted in Eastern time).
Most cable television and national broadcast networks advertise airing times in Eastern time. National broadcast networks (ABC, CBS, The CW, Fox Network, NBC) generally have two primary feeds, an eastern feed for Eastern and Central time zones, and a western feed for the Pacific time zone. The prime time is set on Eastern and Pacific at 8:00 pm, with the Central time zone stations receiving the eastern feed at 7:00 pm local time. Mountain time zone stations receive a separate feed at 7:00 pm local time. As Arizona does not observe daylight saving time, during the summer months, it has its own feed at 7:00 pm local time. Cable channels with a separate western feed (such as HBO, whose western feed is called "HBOW") generally air the same programming as the eastern feed delayed by three hours. Other cable networks such as the Discovery family of networks repeat their prime time programming three hours later; this allows for the same show to be advertised as airing at "8:00 pm E/P" (that is, "8:00 pm Eastern and Pacific time"). Networks specializing in the airing of sports events, such as ESPN, advertise all of their programming in Eastern and Pacific, incorporating the 3-hour time difference (as in "8:00 pm Eastern/5:00 pm Pacific") and leaving viewers in the remaining time zones to calculate start time in their own areas.
|Time zones in North America|
|Time zone||Hours from UTC: Standard time||Hours from UTC: Daylight saving|
|Hawaii-Aleutian||–10||–9 (Alaska portion only}|
|Saint Pierre and Miquelon||–3||–2|
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