Business Hours Overlap
Add your office locations, set work hours for each, and instantly see which UTC hours all teams are simultaneously online.
100% client-side · no upload
How to use
- Click "Add Office" and select the time zone of each office.
- Set the start and end of their working hours.
- The tool shows which UTC hours all offices are simultaneously open (green).
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常见问题
- Is the business hours overlap tool free?
- Yes, completely free with no signup and no usage limits.
- Does my data leave my device?
- No. All time zone math runs in your browser using the Intl API. Nothing is sent to any server.
- Does it work on mobile?
- Yes. The tool is mobile-first and works on iPhone Safari and Android Chrome.