Offset
The time difference between Boise and Seoul is 15 hours.
Boise (MDT) is behind Seoul (KST).
MDT: UTC-6
KST: UTC+9
Boise is currently observing daylight saving time; Seoul is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Boise and Seoul don't overlap on the same weekday. Seoul is 15 hours ahead of Boise.
With some flexibility, there’s a workable window outside standard hours:
- 4 PM–8 PM in Boise (7 AM–11 AM the next day in Seoul) — suggest 6:00 PM Boise (9:00 AM Seoul).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving 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
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Boise | Seoul | Day |
|---|---|---|
| 12:00 am | 3:00 pm | Same day |
| 1:00 am | 4:00 pm | Same day |
| 2:00 am | 5:00 pm | Same day |
| 3:00 am | 6:00 pm | Same day |
| 4:00 am | 7:00 pm | Same day |
| 5:00 am | 8:00 pm | Same day |
| 6:00 am | 9:00 pm | Same day |
| 7:00 am | 10:00 pm | Same day |
| 8:00 am | 11:00 pm | Same day |
| 9:00 am | 12:00 am | +1 day |
| 10:00 am | 1:00 am | +1 day |
| 11:00 am | 2:00 am | +1 day |
| 12:00 pm | 3:00 am | +1 day |
| 1:00 pm | 4:00 am | +1 day |
| 2:00 pm | 5:00 am | +1 day |
| 3:00 pm | 6:00 am | +1 day |
| 4:00 pm | 7:00 am | +1 day |
| 5:00 pm | 8:00 am | +1 day |
| 6:00 pm | 9:00 am | +1 day |
| 7:00 pm | 10:00 am | +1 day |
| 8:00 pm | 11:00 am | +1 day |
| 9:00 pm | 12:00 pm | +1 day |
| 10:00 pm | 1:00 pm | +1 day |
| 11:00 pm | 2:00 pm | +1 day |
Daylight saving time
Boise observes daylight saving time; Seoul does not. The offset between the two zones changes when Boise transitions: on Sunday, November 1, 2026, clocks fall back from MDT to MST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 6:05 AM
- Sunset
- 9:24 PM
- Day length
- 15h 20m
- Sunrise
- 5:12 AM
- Sunset
- 7:52 PM
- Day length
- 14h 41m
Daylight overlap: 7h 13m — 2:12 PM–9:24 PM in Boise (5:12 AM–12:24 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 Mountain Time
- BOI
Airports in Korea Standard Time
- GMP
- ICN
- PUS
- TAE
- CJJ
- KWJ
- MWX
Related conversions
Common conversions
- What is 9:00 am Boise in Seoul?
- 9:00 am Boise is 12:00 am Seoul, the next day.
- What is 12:00 pm Boise in Seoul?
- 12:00 pm Boise is 3:00 am Seoul, the next day.
- What is 12:30 pm Boise in Seoul?
- 12:30 pm Boise is 3:30 am Seoul, the next day.
- What is 2:00 pm Boise in Seoul?
- 2:00 pm Boise is 5:00 am Seoul, the next day.
- What is 5:00 pm Boise in Seoul?
- 5:00 pm Boise is 8:00 am Seoul, the next day.
- What is 11:30 pm Boise in Seoul?
- 11:30 pm Boise is 2:30 pm Seoul, the next day.