Convert Hawaii Standard Time to Coordinated Universal Time - Quick & Accurate
Updates live every second
Hover over any hour to see corresponding time in both zones
To schedule a meeting between HST and UTC:
Pro Tip: Schedule calls during the overlap window for optimal convenience for both time zones
| HST Time | UTC Time | Context |
|---|---|---|
| 12:00 AM | 10:00 AM | Midnight HST |
| 01:00 AM | 11:00 AM | Late Night |
| 02:00 AM | 12:00 PM | Late Night |
| 03:00 AM | 01:00 PM | Late Night |
| 04:00 AM | 02:00 PM | Late Night |
| 05:00 AM | 03:00 PM | Late Night |
| 06:00 AM | 04:00 PM | Early Morning HST |
| 07:00 AM | 05:00 PM | Night Time |
| 08:00 AM | 06:00 PM | Night Time |
| 09:00 AM | 07:00 PM | Work Starts HST |
| 10:00 AM | 08:00 PM | Night Time |
| 11:00 AM | 09:00 PM | Night Time |
Honolulu
Pacific/Honolulu
UTC
UTC
UTC (Coordinated Universal Time) is 10 hours ahead of HST (Hawaii Standard Time). This means when it's 12:00 PM in Honolulu (HST), it's 10:00 PM in UTC (UTC).
The best time to call from HST to UTC is during overlapping business hours. For HST callers, schedule between 9:00 AM - 12:00 PM HST to ensure both parties are within standard business hours.
The time difference may change during daylight saving transitions if one region observes DST while the other doesn't. Hawaii Standard Time (UTC-10) and Coordinated Universal Time (UTC+0) may have different DST schedules.
HST includes cities like Honolulu. UTC includes cities like UTC. Both time zones cover important business and cultural centers.
In 2025, DST in North America starts on March 9 at 2:00 AM and ends on November 2 at 2:00 AM. Other regions may have different DST schedules or not observe DST at all.