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astronomyuniversal (Universal Time ( ** )

Universal Time

Universal TIme (UT):  To convert a Universal time and date to a standard time and date in North America, subtract the following hours:

  • Eastern Standard Time (EST) – 5 hours
  • Central Standard Time (CST) – 6 hours
  • Mountain Standard Time (MST) – 7 hours
  • Pacific Standard Time (PST) – 8 hours
  • Alaska Standard Time (AST) – 9 hours
  • Hawaii Standard Time (HST) – 10 hours

To obtain daylight savings time, subtract one hour less than the above-listed values.  If you get a negative number of hours, add 24 hours; in this case the result falls on the date before the UT date given.  For example 6:45 UT November 9th is 1:45 am November 9th EST and 10:45 pm November 8th PST.

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