Pair comparison

Japan vs South Korea

Japan is same time as South Korea. Their business-hour overlap is 9 hours per day.

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.

Japan

Reference city: Tokyo

01:42GMT+9

Fri · Nov 6 · UTC+09:00

DST shifts / 12mo: 0
Public holidays 2026: 17

South Korea

Reference city: Seoul

01:42GMT+9

Fri · Nov 6 · UTC+09:00

DST shifts / 12mo: 0
Public holidays 2026: 15

Operational read on this pair

Coordination class

same-day coordination

Japan and South Korea have a broad overlap window today, so normal recurring meetings are low-friction. Still recheck invites around DST transition weeks.

DST drift risk

0 sampled shifts / 12mo

Neither sampled reference zone has a DST transition in the next 12 months, so the offset gap is unusually stable for recurring calls.

Holiday availability

17 vs 15 listed holidays

Japan and South Korea 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

same-day coordination

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 Japan

morning standup: 9:00 AM in Japan is 9:00 AM in South Korea (same day).
midday review: 1:00 PM in Japan is 1:00 PM in South Korea (same day).
end-of-day handoff: 5:00 PM in Japan is 5:00 PM in South Korea (same day).

Anchored in South Korea

morning standup: 9:00 AM in South Korea is 9:00 AM in Japan (same day).
midday review: 1:00 PM in South Korea is 1:00 PM in Japan (same day).
end-of-day handoff: 5:00 PM in South Korea is 5:00 PM in Japan (same day).

Best live-use strategy

9 shared business hours is enough for normal recurring meetings, reviews, and same-day escalation, assuming neither side is on holiday.

Japan next holiday checks

Labour Thanksgiving Day (2026-11-23)

South Korea next holiday checks

Christmas Day (2026-12-25)

Business-hour overlap

Overlap window: 00:00 → 09:00 UTC · 9h per day.

24-hour overlap heatmap (UTC across the bottom)

Japan

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South Korea

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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)

2026-01-01Japan: New Year's Day · South Korea: New Year's Day
2026-05-05Japan: Children's Day · South Korea: Children's Day

Both teams may be off on the dates above — useful for sprint planning and launch calendars.