What is HST in KST?
Korea Standard Time is 19 hours ahead
Hawaii Standard Time is on UTC−10:00 and Korea Standard Time is on UTC+9:00 right now. That gap holds all year, because both zones change their clocks together.
- Time in Honolulu
- 4:56 pm
- Time in Seoul
- 11:56 am
- Difference
- +19 h
- Next clock change
- Neither zone
Convert a time
KST — Korea Standard Time
11:00 am
Wed, the next day
Daylight saving
Hawaii Standard Time
Hawaii Standard Time stays on HST all year, so its offset from UTC never moves.
Korea Standard Time
Korea Standard Time stays on KST all year, so its offset from UTC never moves.
HST to KST conversion table
Every hour of Tuesday, September 22, 2026, converted from Hawaii Standard Time to Korea Standard Time. 19 of the 24 hours fall on a different calendar day in Seoul, which is marked.
- 12:00 am HST
- 7:00 pm KST
- 1:00 am HST
- 8:00 pm KST
- 2:00 am HST
- 9:00 pm KST
- 3:00 am HST
- 10:00 pm KST
- 4:00 am HST
- 11:00 pm KST
- 5:00 am HST
- 12:00 am KST+1 day
- 6:00 am HST
- 1:00 am KST+1 day
- 7:00 am HST
- 2:00 am KST+1 day
- 8:00 am HST
- 3:00 am KST+1 day
- 9:00 am HST
- 4:00 am KST+1 day
- 10:00 am HST
- 5:00 am KST+1 day
- 11:00 am HST
- 6:00 am KST+1 day
- 12:00 pm HST
- 7:00 am KST+1 day
- 1:00 pm HST
- 8:00 am KST+1 day
- 2:00 pm HST
- 9:00 am KST+1 day
- 3:00 pm HST
- 10:00 am KST+1 day
- 4:00 pm HST
- 11:00 am KST+1 day
- 5:00 pm HST
- 12:00 pm KST+1 day
- 6:00 pm HST
- 1:00 pm KST+1 day
- 7:00 pm HST
- 2:00 pm KST+1 day
- 8:00 pm HST
- 3:00 pm KST+1 day
- 9:00 pm HST
- 4:00 pm KST+1 day
- 10:00 pm HST
- 5:00 pm KST+1 day
- 11:00 pm HST
- 6:00 pm KST+1 day
Scheduling between the two
Working hours overlap from 2:00 pm to 6:00 pm HST, which is 9:00 am to 1:00 pm KST. Anything inside that window falls in the normal working day at both ends.
Hawaii Standard Time (HST) is used in all of Hawaii, which does not observe daylight saving