The short answer
Greenwich Mean Time is 11 hours ahead of Hawaii Time.
Greenwich Mean Time☀
6:22:09am
BST · UTC+01:00 · Mon, Jun 22
Hawaii Time☾
7:22:09pm
HST · UTC-10:00 · Sun, Jun 21
Read across to convert
Greenwich Mean Time
BST · UTC+01:00
Hawaii Time
HST · UTC-10:00
Click any row to pin that hour across both zones.
12amMon
1pmSun ·−1d
WORK1am
2pmSun ·−1d
WORK2am
3pmSun ·−1d
WORK3am
4pmSun ·−1d
WORK4am
5pmSun ·−1d
5am
6pmSun ·−1d
NOW
6am
7pmSun ·−1d
7am
8pmSun ·−1d
8am
9pmSun ·−1d
9am
WORK10pmSun ·−1d
10am
WORK11pmSun ·−1d
11am
WORK12amMon
12pm
WORK1am
1pm
WORK2am
2pm
WORK3am
3pm
WORK4am
4pm
WORK5am
5pm
6am
6pm
7am
7pm
8am
8pm
9am
WORK9pm
10am
WORK10pm
11am
WORK11pm
12pm
WORKdaylightnightworking hoursoverlap
Best time to meet=
Closest workable window
Just outside the working window — early on one side, late on the other.
Greenwich Mean Time
6pm–7pm
Hawaii Time
7am–8am
Popular conversions
Quick reference.
9amGreenwich Mean Time=10pmHawaii Time · prev day
12pmGreenwich Mean Time=1amHawaii Time
3pmGreenwich Mean Time=4amHawaii Time
5pmGreenwich Mean Time=6amHawaii Time
9pmGreenwich Mean Time=10amHawaii Time
In context
What each side covers.
Greenwich Mean Time
6:22amBST · UTC+01:00
Cities on this clock
Hawaii Time
7:22pmHST · UTC-10:00
US
Related converters
Other popular pairs.
Pacific Time
10:22pm
India Standard Time
10:52am
Pacific Time to India12 hours 30 minutes behind
Eastern Standard Time
1:22am
Central European Time
7:22am
Eastern Time to Central Europe6 hours behind
India Standard Time
10:52am
Eastern Standard Time
1:22am
India to Eastern Time9 hours 30 minutes ahead
Greenwich Mean Time
6:22am
India Standard Time
10:52am
London to India4 hours 30 minutes behind
Pacific Standard Time
10:22pm
Eastern Standard Time
1:22am
Pacific to Eastern Time3 hours behind
Central European Time
7:22am
India Standard Time
10:52am
Central Europe to India3 hours 30 minutes behind
Frequently asked
Quick answers about converting between Greenwich Mean Time and Hawaii Time. Can't find what you need? Email [email protected].
- What is the time difference between Greenwich Mean Time and Hawaii Time?
- Greenwich Mean Time is 11 hours ahead of Hawaii Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.
- When it's 9am in Greenwich Mean Time, what time is it in Hawaii Time?
- 9am in Greenwich Mean Time is 10pm in Hawaii Time on the previous day. Use the hour-by-hour table above to read any other time across — find the row and read the matching cell in the other column.
- What's the best time for a call between Greenwich Mean Time and Hawaii Time?
- There's no comfortable 9-to-5 overlap between Greenwich Mean Time and Hawaii Time — they sit on opposite sides of the planet's working day. Plan for an early or late call on one side, or hand work off asynchronously.
- Does this account for daylight saving time?
- Yes. We track every clock change in both places, so the abbreviations you see — BST and HST — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.
- Why is the date sometimes different on each side?
- When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.