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DateAlmanac

What is GMT in HST?

Hawaii Standard Time is 10 hours behind

Greenwich Mean Time is on UTC+0:00 and Hawaii Standard Time is on UTC−10:00 right now. That gap holds all year, because neither zone observes daylight saving.

Convert a time

HST — Hawaii Standard Time

10:00 pm

HST, Fri, the previous day

Time in Greenwich
8:29:39 AM
Time in Honolulu
10:29:39 PM
Difference
−10 h
Next clock change
Neither zone

Daylight saving

Greenwich Mean Time

No clock changes

Greenwich Mean Time stays on GMT all year, so its offset from UTC never moves.

Hawaii Standard Time

No clock changes

Hawaii Standard Time stays on HST all year, so its offset from UTC never moves.

GMT to HST conversion table

Every hour of Saturday, November 7, 2026, converted from Greenwich Mean Time to Hawaii Standard Time. 10 of the 24 hours fall on a different calendar day in Honolulu, which is marked.

12:00 am GMT
2:00 pm HST−1 day
1:00 am GMT
3:00 pm HST−1 day
2:00 am GMT
4:00 pm HST−1 day
3:00 am GMT
5:00 pm HST−1 day
4:00 am GMT
6:00 pm HST−1 day
5:00 am GMT
7:00 pm HST−1 day
6:00 am GMT
8:00 pm HST−1 day
7:00 am GMT
9:00 pm HST−1 day
8:00 am GMT
10:00 pm HST−1 day
9:00 am GMT
11:00 pm HST−1 day
10:00 am GMT
12:00 am HST
11:00 am GMT
1:00 am HST
12:00 pm GMT
2:00 am HST
1:00 pm GMT
3:00 am HST
2:00 pm GMT
4:00 am HST
3:00 pm GMT
5:00 am HST
4:00 pm GMT
6:00 am HST
5:00 pm GMT
7:00 am HST
6:00 pm GMT
8:00 am HST
7:00 pm GMT
9:00 am HST
8:00 pm GMT
10:00 am HST
9:00 pm GMT
11:00 am HST
10:00 pm GMT
12:00 pm HST
11:00 pm GMT
1:00 pm HST

Scheduling between the two

There is no overlap between a nine-to-six working day in Greenwich and one in Honolulu — the gap is too wide. A call has to sit early or late for one side. Early morning in Greenwich is the usual compromise, since that is late afternoon or evening in Honolulu.

Greenwich Mean Time (GMT) is used in as a fixed UTC+0 offset. Note that the UK itself leaves GMT every summer — see British Time below.

Hawaii Standard Time (HST) is used in all of Hawaii, which does not observe daylight saving

Other conversions