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GMT to HST converter
Greenwich Mean Time
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Hawaii Time
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Hawaii Time is always 10 hours behind Greenwich Mean Time.
When does the difference change?
The difference stays the same all year: HST is 10 hours behind GMT.
Questions
What time is 9 AM GMT in HST?
9 AM Greenwich Mean Time is 11 PM the day before Hawaii Time.
How many hours ahead or behind is HST from GMT?
Hawaii Time is always 10 hours behind Greenwich Mean Time.
Does the GMT to HST difference change?
No, it stays the same all year.
About these time zones
GMT to HST, hour by hour
| Greenwich Mean Time | Hawaii Time |
|---|---|
| 12 AM | 2 PM (previous day) |
| 1 AM | 3 PM (previous day) |
| 2 AM | 4 PM (previous day) |
| 3 AM | 5 PM (previous day) |
| 4 AM | 6 PM (previous day) |
| 5 AM | 7 PM (previous day) |
| 6 AM | 8 PM (previous day) |
| 7 AM | 9 PM (previous day) |
| 8 AM | 10 PM (previous day) |
| 9 AM | 11 PM (previous day) |
| 10 AM | 12 AM |
| 11 AM | 1 AM |
| 12 PM | 2 AM |
| 1 PM | 3 AM |
| 2 PM | 4 AM |
| 3 PM | 5 AM |
| 4 PM | 6 AM |
| 5 PM | 7 AM |
| 6 PM | 8 AM |
| 7 PM | 9 AM |
| 8 PM | 10 AM |
| 9 PM | 11 AM |
| 10 PM | 12 PM |
| 11 PM | 1 PM |
Based on the clocks on Monday, October 12, 2026. Use the converter above for another date.