Curated by Vinod Kumar Jain & Amit Jain · All Frontier Global · free, no login
Find the hours two or three locations actually share. Pick each side’s UTC offset and working window; the overlap is drawn on a 24-hour bar and written out in every local time. It uses the offsets you pick — daylight saving moves them seasonally, so check the current local time before you send an invitation.
Location 1
Location 2
Location 3 (optional)
How the overlap is worked out
Each working window is converted from local time to UTC by subtracting that location’s offset, and laid onto a 24-hour day in 15-minute slots — fine enough for the half-hour and quarter-hour offsets some countries use.
Windows that run past midnight are handled as two pieces, so an evening shift still lines up correctly against a morning one elsewhere.
The overlap is the set of slots every included location marks as working. It is then translated back into each location’s own local clock.
The bar shows the whole UTC day left to right, midnight to midnight, with the shared slots filled.
Honest limits
Daylight saving is not applied. Roughly a third of the world shifts its offset twice a year, and not on the same dates. This tool uses exactly the offsets you picked — the city labels are there to help you find the right one, not to look up a live clock. Confirm the current local time before booking anything.
No live clock, no timezone database, no location lookup. Nothing is fetched. The city names next to each offset are common examples for that offset at a typical time of year, not an authoritative mapping.
A shared hour is not always a good hour. An overlap that lands at 7am for one side and 9pm for the other is technically a window and practically a bad meeting. The bar is there so you can see which end is paying.
Half-hour and quarter-hour offsets are supported because several countries use them; if the offset you need is missing, pick the nearest and adjust by hand.
Sources
None. No timezone database is embedded and no clock or location service is called — the calculation uses only the offsets and working hours you selected. For authoritative current offsets including daylight saving, check a live source for each city on the day.