Offset
The time difference between Osaka and Greenwich Mean Time is 8 hours.
Osaka (JST) is ahead of Greenwich Mean Time (BST).
JST: UTC+9
BST: UTC+1
Greenwich Mean Time is currently observing daylight saving time; Osaka is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Osaka and Greenwich Mean Time don't overlap on the same weekday. Greenwich Mean Time is 8 hours behind Osaka.
With some flexibility, there’s a workable window outside standard hours:
- 3 PM–8 PM in Osaka (7 AM–12 PM in Greenwich Mean Time) — suggest 5:00 PM Osaka (9:00 AM Greenwich Mean Time).
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.
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 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
About these zones
Osaka uses Japan Standard Time (JST). To call Japan, dial +81.
Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.
Greenwich Mean Time is approximately 5,900 miles northwest of Osaka.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Osaka | GMT | Day |
|---|---|---|
| 12:00 am | 4:00 pm | -1 day |
| 1:00 am | 5:00 pm | -1 day |
| 2:00 am | 6:00 pm | -1 day |
| 3:00 am | 7:00 pm | -1 day |
| 4:00 am | 8:00 pm | -1 day |
| 5:00 am | 9:00 pm | -1 day |
| 6:00 am | 10:00 pm | -1 day |
| 7:00 am | 11:00 pm | -1 day |
| 8:00 am | 12:00 am | Same day |
| 9:00 am | 1:00 am | Same day |
| 10:00 am | 2:00 am | Same day |
| 11:00 am | 3:00 am | Same day |
| 12:00 pm | 4:00 am | Same day |
| 1:00 pm | 5:00 am | Same day |
| 2:00 pm | 6:00 am | Same day |
| 3:00 pm | 7:00 am | Same day |
| 4:00 pm | 8:00 am | Same day |
| 5:00 pm | 9:00 am | Same day |
| 6:00 pm | 10:00 am | Same day |
| 7:00 pm | 11:00 am | Same day |
| 8:00 pm | 12:00 pm | Same day |
| 9:00 pm | 1:00 pm | Same day |
| 10:00 pm | 2:00 pm | Same day |
| 11:00 pm | 3:00 pm | Same day |
Daylight saving time
Greenwich Mean Time observes daylight saving time; Osaka 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
- 4:45 AM
- Sunset
- 7:11 PM
- Day length
- 14h 26m
- Sunrise
- 4:45 AM
- Sunset
- 9:17 PM
- Day length
- 16h 32m
Daylight overlap: 6h 26m — 12:45 PM–7:11 PM in Osaka (4:45 AM–11:11 AM in Greenwich Mean Time). Both locations are in daylight during this window.
Cities in these zones
Other cities in Japan Standard Time
Cities in Greenwich Mean 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 Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Related conversions
Common conversions
- What is 9:00 am Osaka in GMT?
- 9:00 am Osaka is 1:00 am GMT.
- What is 12:00 pm Osaka in GMT?
- 12:00 pm Osaka is 4:00 am GMT.
- What is 12:30 pm Osaka in GMT?
- 12:30 pm Osaka is 4:30 am GMT.
- What is 2:00 pm Osaka in GMT?
- 2:00 pm Osaka is 6:00 am GMT.
- What is 5:00 pm Osaka in GMT?
- 5:00 pm Osaka is 9:00 am GMT.
- What is 11:30 pm Osaka in GMT?
- 11:30 pm Osaka is 3:30 pm GMT.