KST to HST Converter
HST is 19 hours behind KST. 9:00 AM KST = 2:00 PM HST (previous day).
HST is 19 hours behind KST. To convert KST to HST, subtract 19 hours from the KST time: 9:00 AM KST = 2:00 PM HST (previous day).
KST (Korea Time) is used in South Korea. HST (Hawaii-Aleutian Time) is used in Hawaii (all year, no daylight saving time).
KST to HST time conversion table
KST to HST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| KST | HST | Day |
|---|---|---|
| 12:00 AM KST | 5:00 AM HST | previous day |
| 1:00 AM KST | 6:00 AM HST | previous day |
| 2:00 AM KST | 7:00 AM HST | previous day |
| 3:00 AM KST | 8:00 AM HST | previous day |
| 4:00 AM KST | 9:00 AM HST | previous day |
| 5:00 AM KST | 10:00 AM HST | previous day |
| 6:00 AM KST | 11:00 AM HST | previous day |
| 7:00 AM KST | 12:00 PM HST | previous day |
| 8:00 AM KST | 1:00 PM HST | previous day |
| 9:00 AM KST | 2:00 PM HST | work hours |
| 10:00 AM KST | 3:00 PM HST | work hours |
| 11:00 AM KST | 4:00 PM HST | work hours |
| 12:00 PM KST | 5:00 PM HST | previous day |
| 1:00 PM KST | 6:00 PM HST | previous day |
| 2:00 PM KST | 7:00 PM HST | previous day |
| 3:00 PM KST | 8:00 PM HST | previous day |
| 4:00 PM KST | 9:00 PM HST | previous day |
| 5:00 PM KST | 10:00 PM HST | previous day |
| 6:00 PM KST | 11:00 PM HST | previous day |
| 7:00 PM KST | 12:00 AM HST | night |
| 8:00 PM KST | 1:00 AM HST | night |
| 9:00 PM KST | 2:00 AM HST | night |
| 10:00 PM KST | 3:00 AM HST | night |
| 11:00 PM KST | 4:00 AM HST | night |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert KST to HST
Subtract 19 hours from the KST time to get HST.
Example: 9:00 AM KST = 2:00 PM HST (previous day).
Across midnight: 1:00 AM KST = 6:00 AM HST (previous day). The date changes, so always check the day as well as the hour.
Time difference between KST and HST
The time difference between KST and HST is 19 hours all year – HST is behind KST.
KST and HST during daylight saving time
- KST does not observe daylight saving time; it stays on UTC+9 all year.
- HST does not observe daylight saving time; it stays on UTC−10 all year.
Best time for a meeting between KST and HST
KST and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM KST, which is 12:00 PM HST.
KST to HST FAQ
What is the time difference between KST and HST?
HST is 19 hours behind KST all year. 9:00 AM KST = 2:00 PM HST (previous day).
What is 9 AM KST in HST?
9:00 AM KST is 2:00 PM HST (previous day).
What is 12 PM (noon) KST in HST?
12:00 PM KST is 5:00 PM HST (previous day).
Is HST ahead of or behind KST?
HST is 19 hours behind KST, so it is earlier in HST than in KST.
Does KST change for daylight saving time?
No. KST 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 KST and HST?
KST and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM KST, which is 12:00 PM HST.
Related conversions
Convert HST to KST
Convert KST to other time zones
Convert other time zones to HST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.