HST to GMT Time Converter

Convert Hawaii Standard Time (HST) to Greenwich Mean Time (GMT). Both time zones are shown live below; current offset between them is 11 hours ahead.

Honolulu · Hawaii Standard Time
04:02:12
Thursday, May 14, 2026
HST · UTC-10:00
London · Greenwich Mean Time
15:02:12
Thursday, May 14, 2026
GMT+1 · UTC+01:00

Convert a specific time

From: HST (Honolulu)
To: GMT (London)
--:--

Daylight Saving status right now

HST (Hawaii Standard Time)
Observes DST
No
GMT (Greenwich Mean Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00

Heads up: GMT observes DST while HST does not. The 11-hour difference shown above will shift by one hour when GMT starts or ends DST.

When can HST and GMT meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
HST
GMT
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Honolulu (HST). Each row shows the local working-hours state in that zone for the same moment in time.
No business-hours overlap exists between HST and GMT.
The two zones are too far apart for synchronous meetings during normal working hours. Plan async or schedule outside 9-5 on at least one side.

Hour-by-hour HST to GMT conversion table

HST time (Honolulu)GMT time (London)Status
00:00 Thu11:00 ThuGMT working
01:00 Thu12:00 ThuGMT working
02:00 Thu13:00 ThuGMT working
03:00 Thu14:00 ThuGMT working
04:00 Thu15:00 ThuGMT working
05:00 Thu16:00 ThuGMT working
06:00 Thu17:00 ThuOff-hours both sides
07:00 Thu18:00 ThuOff-hours both sides
08:00 Thu19:00 ThuOff-hours both sides
09:00 Thu20:00 ThuHST working
10:00 Thu21:00 ThuHST working
11:00 Thu22:00 ThuHST working
12:00 Thu23:00 ThuHST working
13:00 Thu00:00 FriHST working
14:00 Thu01:00 FriHST working
15:00 Thu02:00 FriHST working
16:00 Thu03:00 FriHST working
17:00 Thu04:00 FriOff-hours both sides
18:00 Thu05:00 FriOff-hours both sides
19:00 Thu06:00 FriOff-hours both sides
20:00 Thu07:00 FriOff-hours both sides
21:00 Thu08:00 FriOff-hours both sides
22:00 Thu09:00 FriGMT working
23:00 Thu10:00 FriGMT working

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Hawaii Standard Time (HST)
IANA identifier
Pacific/Honolulu
Current UTC offset
UTC-10:00
Current abbreviation
HST
Major cities in this zone
Honolulu
Greenwich Mean Time (GMT)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham

Sun today in Honolulu and London

Honolulu
Sunrise
05:55
Sunset
19:03
Solar noon
12:29
Daylight
13h 8m
London
Sunrise
05:11
Sunset
20:44
Solar noon
12:58
Daylight
15h 32m

Related converters

GMT to HST (reverse)HST to ESTHST to PSTHST to UTCHST to CETHST to ISTEST to GMTPST to GMTUTC to GMTCET to GMTIST to GMT
Looking for local time? See time in Honolulu or time in London.

Frequently asked questions

What is the time difference between HST and GMT right now?+
GMT (Greenwich Mean Time) is currently 11 hours ahead HST (Hawaii Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does HST or GMT observe daylight saving time?+
HST: does not observe daylight saving time. GMT: observes daylight saving time.
When is the best time to schedule a meeting between HST and GMT?+
HST and GMT have no business-hour overlap, even at the edges of a typical workday. Async collaboration or non-9-5 scheduling is the practical choice.
What time is it in London when it is 12:00 noon in Honolulu?+
When it is 12:00 Thu in Honolulu (HST), it is 23:00 Thu in London (GMT).
Which IANA time zone identifiers are used for HST and GMT?+
HST maps to "Pacific/Honolulu" in the IANA database. GMT maps to "Europe/London". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Honolulu ahead of or behind London?+
Whether Honolulu (HST) is ahead of or behind London (GMT) depends on the current UTC offsets. Right now GMT is 11 hours ahead HST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for HST and GMT?+
HST is UTC-10:00 (HST) and GMT is UTC+01:00 (GMT+1). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both HST and GMT?+
No standard business-hours overlap exists between HST and GMT. Plan asynchronous work or schedule outside 9-5 on at least one side.