Coordination class
async-first pair
United Kingdom and Japan do not share standard 9-to-6 business hours today. Treat this as an async-first corridor and reserve synchronous calls for edge-hour handoffs.
Pair comparison
United Kingdom vs Japan
United Kingdom is 9.0 hours behind Japan. They have no overlap in standard 9-to-6 business hours — you'll need edge-hour meetings.
Country comparisons use one representative IANA zone per country, current public-holiday rows, and a same-day business-hour model. Multi-zone countries still need city-level checks before travel or payroll decisions.
Live values rendered at Nov 5, 4:42 PM UTC.
United Kingdom
Reference city: London
16:42GMT+0
Thu · Nov 5 · UTC+00:00
- DST shifts / 12mo
- 2
- Public holidays 2026
- 14
Japan
Reference city: Tokyo
01:42GMT+9
Fri · Nov 6 · UTC+09:00
- DST shifts / 12mo
- 0
- Public holidays 2026
- 17
Operational read on this pair
DST drift risk
2 sampled shifts / 12mo
United Kingdom shifts clocks while Japan is stable in the sampled reference zone, so recurring meetings can move by one hour for part of the year.
Holiday availability
14 vs 17 listed holidays
United Kingdom and Japan share 2 listed holiday dates in the selected year, so shared shutdown risk is visible before campaign or sprint planning.
Pair workflow examples
What fixed local work times become across the pair
The current offset is enough for today, but the examples below make the page useful for real recurring work: standups, reviews, and end-of-day handoffs anchored to either country. Recheck these around DST transition weeks when either sampled zone shifts.
Anchored in United Kingdom
- morning standup: 9:00 AM in United Kingdom is 6:00 PM in Japan (same day).
- midday review: 1:00 PM in United Kingdom is 10:00 PM in Japan (same day).
- end-of-day handoff: 5:00 PM in United Kingdom is 2:00 AM in Japan (next day).
Anchored in Japan
- morning standup: 9:00 AM in Japan is 12:00 AM in United Kingdom (same day).
- midday review: 1:00 PM in Japan is 4:00 AM in United Kingdom (same day).
- end-of-day handoff: 5:00 PM in Japan is 8:00 AM in United Kingdom (same day).
Best live-use strategy
No shared 9-to-6 window appears today, so United Kingdom and Japan should use async-first workflows, rotating live calls, and written decision logs.
United Kingdom next holiday checks
Saint Andrew's Day (2026-11-30); Christmas Day (2026-12-25); St. Stephen's Day (2026-12-28)
Japan next holiday checks
Labour Thanksgiving Day (2026-11-23)
Business-hour overlap
No overlap in standard 9–18 local working hours. You'll typically schedule synchronous meetings in the early morning for one side and late evening for the other.
24-hour overlap heatmap (UTC across the bottom)
United Kingdom
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Japan
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- Working hours (09–18 local)
- Edge hours (07–09, 18–22)
- Sleep hours (22–07)
Overlapping public holidays in 2026 (2)
- 2026-01-01United Kingdom: New Year's Day · Japan: New Year's Day
- 2026-05-04United Kingdom: Early May Bank Holiday · Japan: Greenery Day
Both teams may be off on the dates above — useful for sprint planning and launch calendars.