Greenwich Mean Time to Hawaii Time
Convert times between Greenwich Mean Time (GMT, UTC+0:00) and Hawaii Time (HST, UTC-10:00). Hawaii Time is 10 hours behind Greenwich Mean Time in standard time. During daylight saving time this difference changes to 11 hours.
UTC+0:00 / +1:00→UTC-10:00
Live timezone converterUTC Offset Reference
| Timezone | Abbreviation | Standard offset | DST offset | Country |
|---|---|---|---|---|
| Greenwich Mean Time | GMT / BST | UTC+0:00 | UTC+1:00 | United Kingdom |
| Hawaii Time | HST | UTC-10:00 | — | United States |
* DST offset applies during summer months. Exact transition dates vary by year.
Standard Time Conversion (GMT → HST)
| Greenwich Mean Time | Hawaii Time |
|---|---|
| 12:00 AM GMT | 2:00 PM (prev day) HST |
| 6:00 AM GMT | 8:00 PM (prev day) HST |
| 9:00 AM GMT | 11:00 PM (prev day) HST |
| 12:00 PM GMT | 2:00 AM HST |
| 3:00 PM GMT | 5:00 AM HST |
| 6:00 PM GMT | 8:00 AM HST |
| 9:00 PM GMT | 11:00 AM HST |
Summer (DST) Conversion (BST → HST)
| Greenwich Mean Time (summer) | Hawaii Time (summer) |
|---|---|
| 12:00 AM BST | 1:00 PM (prev day) HST |
| 6:00 AM BST | 7:00 PM (prev day) HST |
| 9:00 AM BST | 10:00 PM (prev day) HST |
| 12:00 PM BST | 1:00 AM HST |
| 3:00 PM BST | 4:00 AM HST |
| 6:00 PM BST | 7:00 AM HST |
| 9:00 PM BST | 10:00 AM HST |
Daylight Saving Time (DST) Notes
- Greenwich Mean Time observes DST. Clocks advance 1 hour to BST (UTC+1:00) roughly from month 3 to 10.
- The offset difference shifts between 10h (standard) and 11h (DST season). Always verify the current offset using the live converter below.
Frequently Asked Questions
How do I convert GMT to HST?
Add (-10) hours to the GMT time to get HST. For example, 9:00 AM GMT = 11:00 PM HST.
What is the current UTC offset for Greenwich Mean Time?
Greenwich Mean Time is UTC+0:00 during standard time (GMT) and UTC+1:00 during summer daylight saving time (BST).
Is Hawaii Time ahead or behind Greenwich Mean Time?
Hawaii Time is 10 hours behind Greenwich Mean Time in standard time.
When is a good time to schedule a meeting between GMT and HST?
Due to the 10-hour difference, business-hours overlap may be limited. Use the live timezone converter to find a mutually convenient time.
Related Timezone Conversions
Greenwich Mean Time → US Eastern TimeGMT / ESTGreenwich Mean Time → US Central TimeGMT / CSTGreenwich Mean Time → US Mountain TimeGMT / MSTGreenwich Mean Time → US Pacific TimeGMT / PSTGreenwich Mean Time → US Alaska TimeGMT / AKSTGreenwich Mean Time → Canada Atlantic TimeGMT / ASTGreenwich Mean Time → Central European TimeGMT / CETGreenwich Mean Time → Eastern European TimeGMT / EET
Need the exact current time?
Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.