HST to UTC Converter
UTC is 10 hours ahead of HST. 9:00 AM HST = 7:00 PM UTC.
UTC is 10 hours ahead of HST. To convert HST to UTC, add 10 hours to the HST time: 9:00 AM HST = 7:00 PM UTC.
HST (Hawaii-Aleutian Time) is used in Hawaii (all year, no daylight saving time). UTC (UTC) is used in The world's time standard; used in aviation, computing and science.
HST to UTC time conversion table
HST to UTC on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| HST | UTC |
|---|---|
| 12:00 AM | 10:00 AM |
| 1:00 AM | 11:00 AM |
| 2:00 AM | 12:00 PM |
| 3:00 AM | 1:00 PM |
| 4:00 AM | 2:00 PM |
| 5:00 AM | 3:00 PM |
| 6:00 AM | 4:00 PM |
| 7:00 AM | 5:00 PM |
| HST | UTC |
|---|---|
| 8:00 AM | 6:00 PM |
| 9:00 AM | 7:00 PM |
| 10:00 AM | 8:00 PM |
| 11:00 AM | 9:00 PM |
| 12:00 PM | 10:00 PM |
| 1:00 PM | 11:00 PM |
| 2:00 PM | 12:00 AM+1 |
| 3:00 PM | 1:00 AM+1 |
| HST | UTC |
|---|---|
| 4:00 PM | 2:00 AM+1 |
| 5:00 PM | 3:00 AM+1 |
| 6:00 PM | 4:00 AM+1 |
| 7:00 PM | 5:00 AM+1 |
| 8:00 PM | 6:00 AM+1 |
| 9:00 PM | 7:00 AM+1 |
| 10:00 PM | 8:00 AM+1 |
| 11:00 PM | 9:00 AM+1 |
Conversion table from HST to UTC for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in UTC, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert HST to UTC
Add 10 hours to the HST time to get UTC.
Example: 9:00 AM HST = 7:00 PM UTC.
Across midnight: 10:00 PM HST = 8:00 AM UTC (next day). The date changes, so always check the day as well as the hour.
Time difference between HST and UTC
The time difference between HST and UTC is 10 hours all year – UTC is ahead of HST.
HST and UTC during daylight saving time
- HST does not observe daylight saving time; it stays on UTC−10 all year.
- UTC does not observe daylight saving time; it stays on UTC+0 all year.
Best time for a meeting between HST and UTC
HST and UTC have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM HST, which is 5:00 PM UTC.
HST to UTC FAQ
What is the time difference between HST and UTC?
UTC is 10 hours ahead of HST all year. 9:00 AM HST = 7:00 PM UTC.
What is 9 AM HST in UTC?
9:00 AM HST is 7:00 PM UTC.
What is 12 PM (noon) HST in UTC?
12:00 PM HST is 10:00 PM UTC.
Is UTC ahead of or behind HST?
UTC is 10 hours ahead of HST, so it is later in UTC than in HST.
Does HST change for daylight saving time?
No. HST stays on the same offset all year, so conversions never shift for daylight saving time.
Does UTC change for daylight saving time?
No. UTC stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between HST and UTC?
HST and UTC have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM HST, which is 5:00 PM UTC.
Related conversions
Convert UTC to HST
Convert HST to other time zones
Convert other time zones to UTC
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.