Timezone Meeting Overlap Picker
Add each participant's timezone and working hours and this tool finds the exact overlap windows that work for everyone on a chosen date, using DST-safe offset math from the browser's built-in timezone database.
Built by the AbraCalc team
How to play
- Pick the date you want to schedule the meeting for — this matters because daylight saving rules can shift on either side.
- Add each participant with their name, timezone, and working-hour range.
- Click Find overlap to see each person's 24-hour strip and where the highlighted overlap windows fall.
- Read the overlap window chips in UTC, or check each strip's caption for that person's local clock time.
Scheduling across timezones goes wrong the moment daylight saving shifts one city but not another, and a fixed offset silently gets it wrong for weeks every spring and fall. This picker avoids that entirely by reading the real timezone rule in effect on the exact date you're scheduling for, using the timezone database already built into your browser. Add each participant with their timezone and working hours, choose a date, and it shows every overlap window where the meeting actually fits everyone, painting a 24-hour strip per person so you can see at a glance where the colored bars line up. Overnight and wrap-around working hours are handled correctly, and if there's genuinely no shared window, it says so plainly instead of showing a false overlap. Nothing about your participants or their schedules is uploaded or saved anywhere; every calculation happens right in your browser using only your device's own timezone data.
Frequently asked questions
- How is this DST-safe when other tools use a fixed offset?
- Instead of a hardcoded UTC offset table, the tool asks the browser's built-in timezone database what offset a zone actually observes at the specific date you picked, so a date where one region has shifted to daylight saving and another hasn't is calculated correctly rather than off by an hour.
- What happens if there's no time that works for everyone?
- The tool checks every minute of the day against every participant's working hours and, if none overlap, clearly states that no common window exists on that date rather than showing a misleading or approximate overlap.
- Can I add someone with overnight working hours, like a night-shift schedule?
- Yes. Working-hour windows that cross midnight, such as 10 PM to 6 AM, are handled correctly in the overlap math, so night-shift participants are included accurately rather than breaking the calculation.