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城市資料來源:GeoNames(CC BY 4.0)。時區資料來源:IANA 時區資料庫。

  1. WorldClockTools
  2. Find meeting time

Meeting optimizer

Find the best meeting time

Add your teammates' cities, pick a date range and meeting length, and get a ranked list of candidate slots. The optimizer balances working-hours overlap with fairness — so one person isn't always on the 6am call.

Team

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Meeting

Top 8 candidate slots

  1. 1Thu Apr 23 · 13:00 UTC2/3 in working hours
    • New YorkThu 09:00
    • LondonThu 14:00
    • TokyoThu 22:00
  2. 2Fri Apr 24 · 13:00 UTC2/3 in working hours
    • New YorkFri 09:00
    • LondonFri 14:00
    • TokyoFri 22:00
  3. 3Sat Apr 25 · 13:00 UTC2/3 in working hours
    • New YorkSat 09:00
    • LondonSat 14:00
    • TokyoSat 22:00
  4. 4Sun Apr 26 · 13:00 UTC2/3 in working hours
    • New YorkSun 09:00
    • LondonSun 14:00
    • TokyoSun 22:00
  5. 5Mon Apr 27 · 13:00 UTC2/3 in working hours
    • New YorkMon 09:00
    • LondonMon 14:00
    • TokyoMon 22:00
  6. 6Tue Apr 28 · 13:00 UTC2/3 in working hours
    • New YorkTue 09:00
    • LondonTue 14:00
    • TokyoTue 22:00
  7. 7Wed Apr 29 · 13:00 UTC2/3 in working hours
    • New YorkWed 09:00
    • LondonWed 14:00
    • TokyoWed 22:00
  8. 8Thu Apr 23 · 13:30 UTC2/3 in working hours
    • New YorkThu 09:30
    • LondonThu 14:30
    • TokyoThu 22:30

Slots are evaluated in 15-minute increments. Working hours default to 9–18 local and can be adjusted per person. Sleep hours (22:00–07:00) are weighted as the most painful.

Questions

FAQ

How does the optimizer rank candidate slots?
Each 15-minute slot in your date range gets two scores: a meeting score (how many participants are inside their working hours, default 9 to 18 local) and a fairness score (how evenly the pain is distributed if anyone is out-of-hours). The composite score subtracts a fairness penalty from the working-hours total, so a slot where everyone is in 9-to-18 ranks above one that hits everyone but with two people at 6am.
Why do you weight sleep hours so heavily?
Asking someone to take a meeting between 22:00 and 07:00 is much more disruptive than asking them to start an hour early or stay an hour late. The optimizer treats those hours as roughly 10x more painful than edge-of-workday hours, which prevents a slot like "3am for one person, 9am for everyone else" from quietly outranking a fairer choice.
Are DST transitions handled correctly?
Yes. Each candidate slot is evaluated using the IANA timezone rules in effect for that specific moment, so a slot picked the week before DST starts in London resolves to a different local time than the same UTC moment two weeks later. There is no fixed UTC-offset shortcut anywhere in the math.
What's in the .ics file I download?
A standard RFC 5545 calendar file with one VEVENT in UTC, plus a description listing each participant's local time at that moment. It opens in Google Calendar, Outlook, Apple Calendar, and any other compliant client. The event is single-instance — for recurring meetings, use the Recurring Meeting Drift tool.
How is this different from the Meeting Planner?
The Meeting Planner is a visual timeline you scrub through interactively to see overlaps. This optimizer is the opposite workflow — you specify the constraints and get a ranked list of suggestions. Use Meeting Planner for exploration; use this for "give me three good options for next week."

Related tools

  • Recurring meeting drift

    How a 9am ET standup actually shifts for your team across DST.

  • Meeting planner

    Visual overlap timeline for cross-zone meetings.

  • Holiday overlap

    Find weeks when every team country is actually working.