Offset
The time difference between Sapporo and Mountain Time is 15 hours.
Sapporo (JST) is ahead of Mountain Time (MDT).
JST: UTC+9
MDT: UTC-6
Mountain Time is currently observing daylight saving time; Sapporo is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Sapporo and Mountain Time don't overlap on the same weekday. Mountain Time is 15 hours behind Sapporo.
Realistic options: hand off asynchronously, or stretch one side by an hour to catch the other team at the start or end of their day.
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.
Japan
- New Year's DayThu, Jan 1
- Coming of Age DayMon, Jan 12
- Foundation DayWed, Feb 11
- The Emperor's BirthdayMon, Feb 23
- Vernal Equinox DayFri, Mar 20
- Shōwa DayWed, Apr 29
- Constitution Memorial DayWed, May 6
- Greenery DayMon, May 4
- Children's DayTue, May 5
- Marine DayMon, Jul 20
- Mountain DayTue, Aug 11
- Respect for the Aged DayMon, Sep 21
- Autumnal Equinox DayWed, Sep 23
- Sports DayMon, Oct 12
- Culture DayTue, Nov 3
- Labour Thanksgiving DayMon, Nov 23
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
About these zones
Sapporo uses Japan Standard Time (JST). To call Japan, dial +81.
Mountain Time is also known as MST, or MDT. To call United States, dial +1.
Mountain Time is approximately 5,400 miles northeast of Sapporo.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Sapporo | MST | Day |
|---|---|---|
| 12:00 am | 9:00 am | -1 day |
| 1:00 am | 10:00 am | -1 day |
| 2:00 am | 11:00 am | -1 day |
| 3:00 am | 12:00 pm | -1 day |
| 4:00 am | 1:00 pm | -1 day |
| 5:00 am | 2:00 pm | -1 day |
| 6:00 am | 3:00 pm | -1 day |
| 7:00 am | 4:00 pm | -1 day |
| 8:00 am | 5:00 pm | -1 day |
| 9:00 am | 6:00 pm | -1 day |
| 10:00 am | 7:00 pm | -1 day |
| 11:00 am | 8:00 pm | -1 day |
| 12:00 pm | 9:00 pm | -1 day |
| 1:00 pm | 10:00 pm | -1 day |
| 2:00 pm | 11:00 pm | -1 day |
| 3:00 pm | 12:00 am | Same day |
| 4:00 pm | 1:00 am | Same day |
| 5:00 pm | 2:00 am | Same day |
| 6:00 pm | 3:00 am | Same day |
| 7:00 pm | 4:00 am | Same day |
| 8:00 pm | 5:00 am | Same day |
| 9:00 pm | 6:00 am | Same day |
| 10:00 pm | 7:00 am | Same day |
| 11:00 pm | 8:00 am | Same day |
Daylight saving time
Mountain Time observes daylight saving time; Sapporo does not. The offset between the two zones changes when Mountain Time 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
- 3:56 AM
- Sunset
- 7:13 PM
- Day length
- 15h 17m
- Sunrise
- 5:33 AM
- Sunset
- 8:27 PM
- Day length
- 14h 54m
Daylight overlap: 7h 31m — 3:56 AM–11:27 AM in Sapporo (12:56 PM–8:27 PM in Mountain Time). Both locations are in daylight during this window.
Cities in these zones
Other cities in Japan Standard Time
Cities in Mountain Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Japan Standard Time
- HND
- NRT
- ITM
- KIX
- UKB
- NGO
- NKM
- CTS
- OKD
- FUK
Airports in Mountain Time
- BJC
- DEN
- OGD
- SLC
Related conversions
Common conversions
- What is 9:00 am Sapporo in MST?
- 9:00 am Sapporo is 6:00 pm MST, the previous day.
- What is 12:00 pm Sapporo in MST?
- 12:00 pm Sapporo is 9:00 pm MST, the previous day.
- What is 12:30 pm Sapporo in MST?
- 12:30 pm Sapporo is 9:30 pm MST, the previous day.
- What is 2:00 pm Sapporo in MST?
- 2:00 pm Sapporo is 11:00 pm MST, the previous day.
- What is 5:00 pm Sapporo in MST?
- 5:00 pm Sapporo is 2:00 am MST.
- What is 11:30 pm Sapporo in MST?
- 11:30 pm Sapporo is 8:30 am MST.