ICT to HST Converter
HST is 17 hours behind ICT. 9:00 AM ICT = 4:00 PM HST (previous day).
HST is 17 hours behind ICT. To convert ICT to HST, subtract 17 hours from the ICT time: 9:00 AM ICT = 4:00 PM HST (previous day).
ICT (Indochina Time) is used in Thailand, Vietnam, Cambodia, Laos. HST (Hawaii-Aleutian Time) is used in Hawaii (all year, no daylight saving time).
ICT to HST time conversion table
ICT to HST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| ICT | HST | Day |
|---|---|---|
| 12:00 AM ICT | 7:00 AM HST | previous day |
| 1:00 AM ICT | 8:00 AM HST | previous day |
| 2:00 AM ICT | 9:00 AM HST | previous day |
| 3:00 AM ICT | 10:00 AM HST | previous day |
| 4:00 AM ICT | 11:00 AM HST | previous day |
| 5:00 AM ICT | 12:00 PM HST | previous day |
| 6:00 AM ICT | 1:00 PM HST | previous day |
| 7:00 AM ICT | 2:00 PM HST | previous day |
| 8:00 AM ICT | 3:00 PM HST | previous day |
| 9:00 AM ICT | 4:00 PM HST | work hours |
| 10:00 AM ICT | 5:00 PM HST | previous day |
| 11:00 AM ICT | 6:00 PM HST | previous day |
| 12:00 PM ICT | 7:00 PM HST | previous day |
| 1:00 PM ICT | 8:00 PM HST | previous day |
| 2:00 PM ICT | 9:00 PM HST | previous day |
| 3:00 PM ICT | 10:00 PM HST | previous day |
| 4:00 PM ICT | 11:00 PM HST | previous day |
| 5:00 PM ICT | 12:00 AM HST | night |
| 6:00 PM ICT | 1:00 AM HST | night |
| 7:00 PM ICT | 2:00 AM HST | night |
| 8:00 PM ICT | 3:00 AM HST | night |
| 9:00 PM ICT | 4:00 AM HST | night |
| 10:00 PM ICT | 5:00 AM HST | night |
| 11:00 PM ICT | 6:00 AM HST | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert ICT to HST
Subtract 17 hours from the ICT time to get HST.
Example: 9:00 AM ICT = 4:00 PM HST (previous day).
Across midnight: 1:00 AM ICT = 8:00 AM HST (previous day). The date changes, so always check the day as well as the hour.
Time difference between ICT and HST
The time difference between ICT and HST is 17 hours all year – HST is behind ICT.
ICT and HST during daylight saving time
- ICT does not observe daylight saving time; it stays on UTC+7 all year.
- HST does not observe daylight saving time; it stays on UTC−10 all year.
Best time for a meeting between ICT and HST
ICT and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM ICT, which is 2:00 PM HST.
ICT to HST FAQ
What is the time difference between ICT and HST?
HST is 17 hours behind ICT all year. 9:00 AM ICT = 4:00 PM HST (previous day).
What is 9 AM ICT in HST?
9:00 AM ICT is 4:00 PM HST (previous day).
What is 12 PM (noon) ICT in HST?
12:00 PM ICT is 7:00 PM HST (previous day).
Is HST ahead of or behind ICT?
HST is 17 hours behind ICT, so it is earlier in HST than in ICT.
Does ICT change for daylight saving time?
No. ICT stays on the same offset all year, so conversions never shift for daylight saving time.
Does HST change for daylight saving time?
No. HST stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between ICT and HST?
ICT and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM ICT, which is 2:00 PM HST.
Related conversions
Convert HST to ICT
Convert ICT to other time zones
Convert other time zones to HST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.