UTC to HST Converter
HST is 10 hours behind of UTC.
UTC
Thursday, October 1, 2026
Coordinated Universal Time · UTC+0
HST
Thursday, October 1, 2026
Hawaii Standard Time · UTC−10
Convert UTC to HST
UTC 17:49 = HST 07:49
UTC to HST time chart, hour by hour
| UTC | HST |
|---|
| 00:00 | 14:00 −1 day |
| 01:00 | 15:00 −1 day |
| 02:00 | 16:00 −1 day |
| 03:00 | 17:00 −1 day |
| 04:00 | 18:00 −1 day |
| 05:00 | 19:00 −1 day |
| 06:00 | 20:00 −1 day |
| 07:00 | 21:00 −1 day |
| 08:00 | 22:00 −1 day |
| 09:00 | 23:00 −1 day |
| 10:00 | 00:00 |
| 11:00 | 01:00 |
| 12:00 | 02:00 |
| 13:00 | 03:00 |
| 14:00 | 04:00 |
| 15:00 | 05:00 |
| 16:00 | 06:00 |
| 17:00 | 07:00 |
| 18:00 | 08:00 |
| 19:00 | 09:00 |
| 20:00 | 10:00 |
| 21:00 | 11:00 |
| 22:00 | 12:00 |
| 23:00 | 13:00 |
There is no overlap between 09:00–18:00 working days in these two places.
How many hours is UTC ahead of HST?
As abbreviations, HST is always 10 hours behind of UTC: UTC is UTC+0 and HST is UTC−10. To convert, subtract 10 hours.
Does the UTC to HST time difference change?
No. Hst is 10 hours behind of utc all year, because neither place changes its clocks.
Calling hours for UTC and HST
- When HST is 10 hours behind of UTC: no shared 09:00 to 17:00 hours; try 17:00 in UTC (07:00 in HST).
Frequently asked questions about UTC and HST time
How many hours ahead is HST of UTC?
HST (UTC−10) is 10 hours behind of UTC (UTC+0).
Does the time difference between UTC and HST change during the year?
No, it stays 10 hours behind all year because neither place changes its clocks.