GMT to HST time converter

HST is 10 hours behind GMT. When it is 9:00 AM in GMT, it is 11:00 PM (Thu, Oct 15) in HST.

GMT UTC

Friday, October 16, 2026

HST UTC-10

Friday, October 16, 2026

GMT
Greenwich Mean Time
Fri, Oct 16
UTC
HST
Hawaii-Aleutian Standard Time
Fri, Oct 16
UTC-10-10h
Finding your time zone…
Shared working hours (9:00–18:00)

GMT to HST conversion table

Every hour of today in GMT and the matching time in HST. Light rows are typical working hours (9:00–18:00).

GMTHST
12:00 AM2:00 PM−1 day
1:00 AM3:00 PM−1 day
2:00 AM4:00 PM−1 day
3:00 AM5:00 PM−1 day
4:00 AM6:00 PM−1 day
5:00 AM7:00 PM−1 day
6:00 AM8:00 PM−1 day
7:00 AM9:00 PM−1 day
8:00 AM10:00 PM−1 day
9:00 AM11:00 PM−1 day
10:00 AM12:00 AM
11:00 AM1:00 AM
12:00 PM2:00 AM
1:00 PM3:00 AM
2:00 PM4:00 AM
3:00 PM5:00 AM
4:00 PM6:00 AM
5:00 PM7:00 AM
6:00 PM8:00 AM
7:00 PM9:00 AM
8:00 PM10:00 AM
9:00 PM11:00 AM
10:00 PM12:00 PM
11:00 PM1:00 PM

Best time to call or meet

Working hours don't overlap fully. The closest fit is 5:00 PM – 6:00 PM in GMT (7:00 AM – 8:00 AM in HST): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference stays 10 hours all year.

More conversions

HST to GMTGMT to UTCGMT to ESTGMT to CSTGMT to MSTGMT to PSTGMT to CETGMT to MSKGMT to GSTGMT to PKTGMT to ISTGMT to SGTGMT to PHT
UTC to HSTEST to HSTCST to HSTMST to HSTPST to HSTCET to HSTMSK to HSTGST to HSTPKT to HSTIST to HSTSGT to HSTPHT to HST

Questions and answers

What is the time difference between GMT and HST?

HST is 10 hours behind GMT.

What time is it in HST when it is 9 AM in GMT?

When it is 9:00 AM in GMT, it is 11:00 PM (Thu, Oct 15) in HST.

When is the best time to call HST from GMT?

Working hours don't overlap fully. The closest fit is 5:00 PM – 6:00 PM in GMT (7:00 AM – 8:00 AM in HST): working hours on one side, early or late on the other.

Does the time difference between GMT and HST change?

No. The difference stays 10 hours all year.