Time Zone Conversions

See the Wikipedia article on world time zones for the best description on the internet these days. My old link to the US Naval Observatory master clock appears to be a thing of the past.

NIST maintains a master clock focused on U.S. time zones (scroll down for UTC).

For some places that I'm likely to be:

Difference from Universal Time (UTC)

(also referred to as Greenwich Mean Time (GMT) or Zulu Time)

Time Zone	Standard Offset	Mar-Nov	Nov-Mar
US Eastern Standard/Daylight Time	-5 hours	-4 hours	-5 hours
US Central Standard/Daylight Time	-6 hours	-5 hours	-6 hours
US Mountain Standard/Daylight Time	-7 hours	-6 hours	-7 hours
US Pacific Standard/Daylight Time	-8 hours	-7 hours	-8 hours
Arizona (always MST)	-7 hours	-7 hours	-7 hours
Hawaiian Standard Time	-10 hours	-10 hours	-10 hours
Australian Eastern Standard/Savings Time	+10 hours	+10 hours	+11 hours
New Zealand	+12 hours	+12 hours	+13 hours
United Kingdom	0 hours	+1 hour	0 hours
Continental Europe	+1 hour	+2 hours	+1 hours

Example: Times in the Pacific during Summer and Winter

Location	June	December
Hawaii	noon Tuesday	noon Tuesday
San Francisco	3 pm Tuesday	2 pm Tuesday
Sydney	8 am Wednesday	9 am Wednesday
Auckland	10 am Wednesday	11 am Wednesday

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Last modified 7 September, 2024. © Gregory C. Sloan.