Offset
The time difference between Greenwich Mean Time and Yokohama is 8 hours.
Greenwich Mean Time (BST) is behind Yokohama (JST).
BST: UTC+1
JST: UTC+9
Greenwich Mean Time is currently observing daylight saving time; Yokohama is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Greenwich Mean Time and Yokohama don't overlap on the same weekday. Yokohama is 8 hours ahead of Greenwich Mean Time.
With some flexibility, there’s a workable window outside standard hours:
- 7 AM–12 PM in Greenwich Mean Time (3 PM–8 PM in Yokohama) — suggest 9:00 AM Greenwich Mean Time (5:00 PM Yokohama).
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 Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
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
About these zones
Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.
Yokohama uses Japan Standard Time (JST). To call Japan, dial +81.
Yokohama is approximately 5,950 miles northeast of Greenwich Mean Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| GMT | Yokohama | Day |
|---|---|---|
| 12:00 am | 8:00 am | Same day |
| 1:00 am | 9:00 am | Same day |
| 2:00 am | 10:00 am | Same day |
| 3:00 am | 11:00 am | Same day |
| 4:00 am | 12:00 pm | Same day |
| 5:00 am | 1:00 pm | Same day |
| 6:00 am | 2:00 pm | Same day |
| 7:00 am | 3:00 pm | Same day |
| 8:00 am | 4:00 pm | Same day |
| 9:00 am | 5:00 pm | Same day |
| 10:00 am | 6:00 pm | Same day |
| 11:00 am | 7:00 pm | Same day |
| 12:00 pm | 8:00 pm | Same day |
| 1:00 pm | 9:00 pm | Same day |
| 2:00 pm | 10:00 pm | Same day |
| 3:00 pm | 11:00 pm | Same day |
| 4:00 pm | 12:00 am | +1 day |
| 5:00 pm | 1:00 am | +1 day |
| 6:00 pm | 2:00 am | +1 day |
| 7:00 pm | 3:00 am | +1 day |
| 8:00 pm | 4:00 am | +1 day |
| 9:00 pm | 5:00 am | +1 day |
| 10:00 pm | 6:00 am | +1 day |
| 11:00 pm | 7:00 am | +1 day |
Daylight saving time
Greenwich Mean Time observes daylight saving time; Yokohama does not. The offset between the two zones changes when Greenwich Mean Time transitions: on Sunday, October 25, 2026, clocks fall back from BST to GMT.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 7:37 AM
- Sunset
- 5:55 PM
- Day length
- 10h 18m
- Sunrise
- 5:55 AM
- Sunset
- 4:58 PM
- Day length
- 11h 4m
Cities in these zones
Cities in Greenwich Mean Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Airports in Japan Standard Time
- HND
- NRT
- ITM
- KIX
- UKB
- NGO
- NKM
- CTS
- OKD
- FUK
Related conversions
Common conversions
- What is 9:00 am GMT in Yokohama?
- 9:00 am GMT is 5:00 pm Yokohama.
- What is 12:00 pm GMT in Yokohama?
- 12:00 pm GMT is 8:00 pm Yokohama.
- What is 12:30 pm GMT in Yokohama?
- 12:30 pm GMT is 8:30 pm Yokohama.
- What is 2:00 pm GMT in Yokohama?
- 2:00 pm GMT is 10:00 pm Yokohama.
- What is 5:00 pm GMT in Yokohama?
- 5:00 pm GMT is 1:00 am Yokohama, the next day.
- What is 11:30 pm GMT in Yokohama?
- 11:30 pm GMT is 7:30 am Yokohama, the next day.