Coordinated Universal Time (UTC)




Coordinated Universal Time (UTC) is the time at the zero or Prime meridian, which runs through Greenwich, England. Time changes one hour with each change of 15 degrees in longitude. The five time zones in the US proper and Canada roughly follow these lines.

Conversion Between UTC and the Pacific Time Zone

Pacific Standard Time is equal to UTC minus 8 hours.
Pacific Daylight Time is equal to UTC minus 7 hours.

  • UTC = Coordinated Universal Time
  • PDT = Pacific Daylight Time
  • PST = Pacific Standard Time
  • *0000 and 2400 are interchangeable.
    (2400 is associated with the date of the day ending, 0000 with the day just starting.)
UTC PDT
PST
0000*
1700 1600
0100 1800 1700
0200 1900 1800
0300 2000
1900
0400 2100
2000
0500 2200
2100
0600 2300
2200
0600 0000*
2300
0700 0100
0000*
0800 0200
0100
0900 0300
0200
1000 0400
0300
1100 0500
0400
1200 0600
0500
1300 0700
0600
1400 0800
0700
1500 0900
0800
1700 1000
0900
1800 1100
1000
1900 1200
1100
2000 1300
1200
2100 1400
1300
2200 1500
1400
2300 1600
1500
2400* 1700
1600

For more information on UTC, see the following sites.