United States time zones

From MB Wiki

The United states has one of the most complicated time zone scenarios of anywhere. Daylight savings time is a pain to deal with in general, but it would appear that many states have their reasons for not participating. Living in Arizona I understand why they would choose against extending the daylight in the summer. If you don't know what I mean then go there for a visit and it will soon become obvious.

MotionBased has assigned TimeZones at the State level. So any activity within a State that contains a single consistent time zone will always inherit that time zone.

The States that have multiple time zones have the time zones assigned at the county level. So the nearest location is associated to your activity and the county of that location will provide the Time Zone. If a county does not have a time zone associated to it then it will inherit the default time zone for the state.

At a later date we may start associating Time Zones specifically to populated places within a region, however, our Time Zone database is currently not detailed beyond the county level.

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Changes to Daylight Savings

Extended Daylight savings is being implemented in 2007 to save energy. Read more... (http://www.timetemperature.com/tzus/daylight_saving_time_extended.shtml)

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States with Multiple Time Zones

  • Alaska
    • St. Lawrence Island may be incorrect
    • Aleutian Islands are different than the default
  • Arizona
    • The Navajo Nation, in northeastern Arizona, does observe Daylight Saving Time. This is currently not the case at MotionBased.
  • Florida
  • Idaho
  • Indiana
    • Indiana can't seem to figure out (http://www.courier-journal.com/apps/pbcs.dll/article?AID=/20050925/COLUMNISTS07/509250400/1025/NEWS02) what Time Zone it wants to be in. We have made no changes at this time and it is defaulted to Eastern Time with no Daylight savings.
  • Kentucky
  • Michigan
  • Nebraska
    • Cherry county (which is split in two) is in Mountain Time because it is the larger section
  • Oregon
  • Tennessee
  • Texas
    • Culbertson county is split, but stayed central since it has the most.
  • North Dakota has many counties that are split
    • Dunn - Mountain Time
    • MacKenzie - Central Time
    • Morton - Mountain Time
    • Sioux - Mountain Time
  • South Dakota has two counties that are split.
    • Jones County - Mountain Time
    • Stanley County - Mountain Time
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References

Time and Temperture (http://www.timetemperature.com)

Greewich Mean Time (http://wwp.greenwichmeantime.com/)

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