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Meeting Time Across Zones

Arranging a call across four places means holding four clocks in your head, and the mistakes are always the same two: forgetting that somewhere has just changed its clocks, and forgetting that the meeting falls on tomorrow's date for somebody. Both come from converting once and adjusting. Nothing here is converted once — every slot is a single instant, and each place's clock, date and weekday are worked out from that instant separately.

What this generator does

Works through the day in half-hour steps, converts each instant into every place's own local time, and ranks the slots by how many places have the whole meeting inside their working hours.

How to use this tool

  1. Set the date and how long the meeting needs to be.
  2. Choose the places and each one's working hours.
  3. Read the times that suit everybody, best first.
  4. Watch for a +1d, which means the meeting is on the next day there.

Understanding the controls

Date
Which day the meeting is on. This matters more than it looks: whether a place is on summer time depends on the date, and so does whether two places overlap at all.
How long
Both ends of the meeting must fit inside the working day. A slot at half past four is no good for an hour's meeting that finishes at half past five.
Places and hours
Between two and eight places, each with its own start and finish. Somebody who starts at eight changes the answer, which is why the hours are set per place rather than assumed.

Common use cases

  • Finding a call time for a team spread across continents
  • Checking whether two places overlap at all during working hours
  • Scheduling around a clock change without getting caught out
  • Seeing how much a meeting would inconvenience each person
  • Working out which places to split into two calls

How this generator works

Daylight saving is not modelled here; it is looked up, from the same time zone data the browser uses everywhere else. Before the answer is shown, every slot's local times are derived a second time from the instant and compared — clock time, date and weekday alike — and nothing marked as suitable is allowed to fall outside that place's own hours.

Randomness and fairness

Nothing is random. The same date, places and hours always give the same answer.

For how randomness is produced across the whole site, see how Generate Random works.

Limitations and good to know

  • One date at a time. Finding a slot that works across a whole week means checking each day.
  • Slots are on the half hour.
  • Working hours are a single block per place, so a lunch break in the middle is not represented.
  • Weekends are shown by the weekday for each place rather than excluded, since not everywhere keeps the same weekend.

Privacy and your data

Everything is worked out in your browser. No dates, places or hours are transmitted or stored.

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