Offset
The time difference between Hawaii Time and Korea Standard Time is 19 hours.
Hawaii Time (HST) is behind Korea Standard Time (KST).
HST: UTC-10
KST: UTC+9
Neither Hawaii Time nor Korea Standard Time is currently observing daylight saving time.
When to schedule
Business-hours overlap: 2 PM–5 PM in Hawaii Time (9 AM–12 PM the next day in Korea Standard Time).
Both teams are in working hours during this window on weekdays.
Suggested time: 3:00 PM Hawaii Time (10:00 AM Korea Standard Time).
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
Hawaii Time is also known as HST. To call United States, dial +1.
Korea Standard Time is also known as KST. To call South Korea, dial +82.
Korea Standard Time is approximately 4,550 miles northwest of Hawaii Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| HST | KST | 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 Hawaii Time nor Korea Standard Time 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
- 7:12 PM
- Day length
- 13h 22m
- Sunrise
- 5:12 AM
- Sunset
- 7:51 PM
- Day length
- 14h 38m
Daylight overlap: 8h 59m — 10:12 AM–7:12 PM in Hawaii Time (5:12 AM–2:12 PM in Korea Standard Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Hawaii Time
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 HST in KST?
- 9:00 am HST is 4:00 am KST, the next day.
- What is 12:00 pm HST in KST?
- 12:00 pm HST is 7:00 am KST, the next day.
- What is 12:30 pm HST in KST?
- 12:30 pm HST is 7:30 am KST, the next day.
- What is 2:00 pm HST in KST?
- 2:00 pm HST is 9:00 am KST, the next day.
- What is 5:00 pm HST in KST?
- 5:00 pm HST is 12:00 pm KST, the next day.
- What is 11:30 pm HST in KST?
- 11:30 pm HST is 6:30 pm KST, the next day.