Offset
The time difference between Honolulu and Seoul is 19 hours.
Honolulu (HST) is behind Seoul (KST).
HST: UTC-10
KST: UTC+9
Neither Honolulu nor Seoul is currently observing daylight saving time.
When to schedule
Business-hours overlap: 2 PM–5 PM in Honolulu (9 AM–12 PM the next day in Seoul).
Both teams are in working hours during this window on weekdays.
Suggested time: 3:00 PM Honolulu (10:00 AM Seoul).
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
South Korea
- New Year's DayThu, Jan 1
- Lunar New YearMon, Feb 16
- Lunar New YearTue, Feb 17
- Lunar New YearWed, Feb 18
- Independence Movement DayMon, Mar 2
- Labour DayFri, May 1
- Children's DayTue, May 5
- Buddha's BirthdayMon, May 25
- Local Election DayWed, Jun 3
- Memorial DaySat, Jun 6
- Constitution DayFri, Jul 17
- Liberation DayMon, Aug 17
- ChuseokThu, Sep 24
- ChuseokFri, Sep 25
- ChuseokSat, Sep 26
- National Foundation DayMon, Oct 5
- Hangul DayFri, Oct 9
- Christmas DayFri, Dec 25
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Honolulu | Seoul | Day |
|---|---|---|
| 12:00 am | 7:00 pm | Same day |
| 1:00 am | 8:00 pm | Same day |
| 2:00 am | 9:00 pm | Same day |
| 3:00 am | 10:00 pm | Same day |
| 4:00 am | 11:00 pm | Same day |
| 5:00 am | 12:00 am | +1 day |
| 6:00 am | 1:00 am | +1 day |
| 7:00 am | 2:00 am | +1 day |
| 8:00 am | 3:00 am | +1 day |
| 9:00 am | 4:00 am | +1 day |
| 10:00 am | 5:00 am | +1 day |
| 11:00 am | 6:00 am | +1 day |
| 12:00 pm | 7:00 am | +1 day |
| 1:00 pm | 8:00 am | +1 day |
| 2:00 pm | 9:00 am | +1 day |
| 3:00 pm | 10:00 am | +1 day |
| 4:00 pm | 11:00 am | +1 day |
| 5:00 pm | 12:00 pm | +1 day |
| 6:00 pm | 1:00 pm | +1 day |
| 7:00 pm | 2:00 pm | +1 day |
| 8:00 pm | 3:00 pm | +1 day |
| 9:00 pm | 4:00 pm | +1 day |
| 10:00 pm | 5:00 pm | +1 day |
| 11:00 pm | 6:00 pm | +1 day |
Daylight saving time
Neither Honolulu nor Seoul observes daylight saving time. The offset between these zones remains constant year-round.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:50 AM
- Sunset
- 7:13 PM
- Day length
- 13h 23m
- Sunrise
- 5:12 AM
- Sunset
- 7:52 PM
- Day length
- 14h 41m
Daylight overlap: 9h 1m — 10:12 AM–7:13 PM in Honolulu (5:12 AM–2:13 PM in Seoul). Both locations are in daylight during this window.
Cities in these zones
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Hawaii Time
- HNL
Airports in Korea Standard Time
- GMP
- ICN
- PUS
- TAE
- CJJ
- KWJ
- MWX
Related conversions
Common conversions
- What is 9:00 am Honolulu in Seoul?
- 9:00 am Honolulu is 4:00 am Seoul, the next day.
- What is 12:00 pm Honolulu in Seoul?
- 12:00 pm Honolulu is 7:00 am Seoul, the next day.
- What is 12:30 pm Honolulu in Seoul?
- 12:30 pm Honolulu is 7:30 am Seoul, the next day.
- What is 2:00 pm Honolulu in Seoul?
- 2:00 pm Honolulu is 9:00 am Seoul, the next day.
- What is 5:00 pm Honolulu in Seoul?
- 5:00 pm Honolulu is 12:00 pm Seoul, the next day.
- What is 11:30 pm Honolulu in Seoul?
- 11:30 pm Honolulu is 6:30 pm Seoul, the next day.