GMT to HST/HDT Converter

Easily convert times between Greenwich Mean Time (GMT) and Hawaii-Aleutian Time (HST/HDT).

GMT Time

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Hawaii-Aleutian Time

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GMT HDT

GMT to HDT Conversion Chart

GMT (UTC+0) HDT (UTC-9)
12:00 AM03:00 PM (Prev Day)
01:00 AM04:00 PM (Prev Day)
02:00 AM05:00 PM (Prev Day)
03:00 AM06:00 PM (Prev Day)
04:00 AM07:00 PM (Prev Day)
05:00 AM08:00 PM (Prev Day)
06:00 AM09:00 PM (Prev Day)
07:00 AM10:00 PM (Prev Day)
08:00 AM11:00 PM (Prev Day)
09:00 AM12:00 AM
10:00 AM01:00 AM
11:00 AM02:00 AM
12:00 PM03:00 AM
01:00 PM04:00 AM
02:00 PM05:00 AM
03:00 PM06:00 AM
04:00 PM07:00 AM
05:00 PM08:00 AM
06:00 PM09:00 AM
07:00 PM10:00 AM
08:00 PM11:00 AM
09:00 PM12:00 PM
10:00 PM01:00 PM
11:00 PM02:00 PM

Frequently Asked Questions (FAQs)

What is the difference between HST and HDT? ▾

Hawaii-Aleutian Standard Time (HST) is 10 hours behind GMT (UTC-10). During Daylight Saving, parts of the zone use Hawaii-Aleutian Daylight Time (HDT), which is 9 hours behind GMT (UTC-9).

Does all of Hawaii use Daylight Saving Time? ▾

No. Most of Hawaii does NOT observe Daylight Saving Time and stays on HST (UTC-10) year-round. Only the Aleutian Islands portion of the time zone observes DST, switching to HDT (UTC-9).

When is Daylight Saving Time for the Aleutian Islands? ▾

Daylight Saving Time begins at 2am on the second Sunday in March and ends at 2am on the first Sunday in November for the Aleutian Islands that observe it.

Which places use Hawaii-Aleutian Time? ▾

This time zone is used by the state of Hawaii and the westernmost of Alaska's Aleutian Islands.

Convert GMT Time Zone to other time Zones

Meetmomentum.tech can convert GMT Time Zone to these other time zones easily:

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