Free scheduling tool
Time Zone Overlap Finder
Compare working hours across 2-4 time zones, spot the realistic meeting windows, then create a poll so everyone can vote without logging in.
Meeting constraints
Time zones (3/4)
The date is used to apply daylight-saving offsets correctly.
Best meeting windows
Shown in UTC with local start times for the selected date.
No shared working-hours overlap found. Try widening the working hours or removing a far-away time zone.
24-hour overlap chart (UTC)
How it works
One UTC day, compared locally
The tool checks each hour of the selected UTC date. It converts that hour into every chosen time zone and keeps only the hours that fall inside the selected local working-hours range for all zones. Consecutive matches become the suggested windows.
Time-zone offsets are calculated for the meeting date, so seasonal daylight-saving changes are reflected. This matters when regions change clocks on different dates.
Limits
A shortlist, not calendar availability
- The same local working-hours range is applied to every selected zone.
- Results use one-hour boundaries and do not inspect personal calendars.
- Public holidays, travel, lunch breaks, and individual preferences are not included.
- Windows that cross the selected UTC date boundary need a second date check.
Treat the result as a realistic set of candidate windows, then use a poll to collect actual participant availability.
Ready to schedule across time zones?
Use the overlap as a shortlist, then let participants vote on the exact times. WhenWorks is free to start and voters do not need an account.
Create a free poll →