Hawaii to KST time conversion
KST is 19 hours ahead of Hawaii.
Time difference with your location
Hawaii is 10 hours behind UTC. Compare with your local time →
Choose a date and time
Choose the local time in Hawaii to convert it to KST on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · Hawaii → KST
This table converts each hour in Hawaii to KST on 2026-10-21.
- Working hours
- Outside working hours
- Night hours
| Hawaii | KST | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 19:007:00 PM | |
| 01:001:00 AM | 20:008:00 PM | |
| 02:002:00 AM | 21:009:00 PM | |
| 03:003:00 AM | 22:0010:00 PM | |
| 04:004:00 AM | 23:0011:00 PM | |
| 05:005:00 AM | 00:0012:00 AM +1 day | |
| 06:006:00 AM | 01:001:00 AM +1 day | |
| 07:007:00 AM | 02:002:00 AM +1 day | |
| 08:008:00 AM | 03:003:00 AM +1 day | |
| 09:009:00 AM | 04:004:00 AM +1 day | |
| 10:0010:00 AM | 05:005:00 AM +1 day | |
| 11:0011:00 AM | 06:006:00 AM +1 day | |
| 12:0012:00 PM | 07:007:00 AM +1 day | |
| 13:001:00 PM | 08:008:00 AM +1 day | ✓ |
| 14:002:00 PM | 09:009:00 AM +1 day | ✓ |
| 15:003:00 PM | 10:0010:00 AM +1 day | ✓ |
| 16:004:00 PM | 11:0011:00 AM +1 day | ✓ |
| 17:005:00 PM | 12:0012:00 PM +1 day | ✓ |
| 18:006:00 PM | 13:001:00 PM +1 day | |
| 19:007:00 PM | 14:002:00 PM +1 day | |
| 20:008:00 PM | 15:003:00 PM +1 day | |
| 21:009:00 PM | 16:004:00 PM +1 day | |
| 22:0010:00 PM | 17:005:00 PM +1 day | |
| 23:0011:00 PM | 18:006:00 PM +1 day |
Quick conversion examples
These examples use Hawaii (UTC-10) and KST (UTC+9); choosing a date applies the local clock changes.
Conversion formula: KST = Hawaii + 19h.
| Hawaii | KST |
|---|---|
| 6:00 AM Hawaii | = 1:00 AM KST (+1 day) |
| 7:00 AM Hawaii | = 2:00 AM KST (+1 day) |
| 8:00 AM Hawaii | = 3:00 AM KST (+1 day) |
| 9:00 AM Hawaii | = 4:00 AM KST (+1 day) |
| 10:00 AM Hawaii | = 5:00 AM KST (+1 day) |
| 12:00 PM Hawaii | = 7:00 AM KST (+1 day) |
| 3:00 PM Hawaii | = 10:00 AM KST (+1 day) |
| 5:00 PM Hawaii | = 12:00 PM KST (+1 day) |
| 6:00 PM Hawaii | = 1:00 PM KST (+1 day) |
| 8:00 PM Hawaii | = 3:00 PM KST (+1 day) |
Overlapping meeting hours
The 08:00–18:00 working day in Hawaii and KST overlaps for 5 hours on 2026-10-21.
- Shared working hours
- 13:00–18:00 Hawaii · 08:00–13:00 KST
Clock changes on both sides, 2026–2028
Hawaii and KST have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | Hawaii | KST |
|---|---|---|
| 2026 | No clock changes; UTC-10 all year. | No clock changes; UTC+9 all year. |
| 2027 | No clock changes; UTC-10 all year. | No clock changes; UTC+9 all year. |
| 2028 | No clock changes; UTC-10 all year. | No clock changes; UTC+9 all year. |
The difference between Hawaii and KST stays constant throughout 2026–2028: KST is 19 hours ahead of Hawaii.
Frequently asked questions
What time is 9 AM Hawaii in KST?
9:00 AM Hawaii = 4:00 AM KST (+1 day), using UTC-10 and UTC+9. Choose a date above for the seasonal local time.
Does the time difference between Hawaii and KST change during the year?
No. Throughout 2026–2028: KST is 19 hours ahead of Hawaii.
How do I tell whether it is day or night in KST?
Read the KST clock above: this guide counts 06:00–18:00 local time as daytime and the rest as nighttime, without using sunrise and sunset.
What is the best time to call between Hawaii and KST?
The shared 08:00–18:00 working window is 13:00–18:00 Hawaii / 08:00–13:00 KST, a total of 5 hours.
What is the time difference between Hawaii and KST now?
Right now, KST is 19 hours ahead of Hawaii. Conversion formula: KST = Hawaii + 19h.