the United States and Japan share no working hours
the United States and Japan have no hours where both are inside their own working day. the United States works 09:00–17:00 and Japan 09:00–18:00, and the offset between them leaves no intersection.
Where this number comes from
the United States works 09:00–17:00 and Japan 09:00–18:00, each on its own clock. The overlap is the intersection of those two days once both are put on the same axis .
On 1 November the difference between them moves by -1 hours. Neither country calls that a clock change of its own — one of them changes and the other does not, or they change on different dates — so a meeting fixed today is an hour out from then until the gap closes again.
The week on each side
the United States works Monday, Tuesday, Wednesday, Thursday, Friday. Japan works Monday, Tuesday, Wednesday, Thursday, Friday. The weeks line up, so the only thing to get right is the hour.
What interrupts it in the next three months
A shared window is worth nothing on a day one side is closed. the United States has Columbus Day (2026-10-12), Veterans Day (2026-11-11), Thanksgiving Day (2026-11-26). Japan has 敬老の日 (2026-09-21), 国民の休日 (2026-09-22), 秋分の日 (2026-09-23), スポーツの日 (2026-10-12).
Who else you can reach
Sources and last check
Times, offsets and sun positions on this page are computed live from the IANA timezone database and the NOAA solar algorithm, so they do not depend on the review dates below.
- Working hours and weekend days for 55 countries
- Source: Published national labour conventions and government working-hours guidance. Last checked, reviewed every 12 months.
Not covered:A national convention, not any given employer. Countries not listed fall back to a nine-to-five, Monday to Friday default, and pages say so rather than implying we checked. - 141 countries: representative IANA zone and whether they observe DST
- Source: Generated by scripts/build-countries.mjs from Intl.DisplayNames and the tzdata shipped with Node. Nothing typed by hand.. Last checked, reviewed every 6 months.
Not covered:13 of them span more than one zone we hold; for those, `iana` is their largest city's zone rather than the whole country's.
FAQ
What is the best time to call Japan from the United States?
There is no hour when both countries are at work. the United States runs 09:00–17:00 and Japan 09:00–18:00; anything live means one side outside their working day.
Does the difference between the United States and Japan change during the year?
Yes. On 1 November it moves by -1 hours, because the two countries change clocks on different dates — or one of them does not change at all. A standing meeting set today is that much out from that date until the other side catches up.