Meeting planner

Each pair has its own page with the time difference, today's overlap and the next clock changes.

• London to New York
• London to Tokyo
• New York to Tokyo
• London to Singapore
• New York to Singapore
• London to Los Angeles
• Los Angeles to New York
• London to San Francisco
• New York to San Francisco
• Singapore to Tokyo
• Los Angeles to Tokyo
• San Francisco to Tokyo

See all 500 city pairs

1. 1.Add the places. Search for each person's city, country, time zone or abbreviation, like Tokyo, India or JST. Your own place is added for you.
2. 2.Pick the date. Choose the meeting date in the organizer's time, so daylight saving time is applied for that day.
3. 3.Check working hours. Working hours default to 09:00 to 17:00 everywhere; change them if your team works different hours.
4. 4.Choose a time. Take one of the three suggested times, or pick any slot in the Fit row of the grid.
5. 5.Share it. Copy the meeting summary or the link and paste it into your invite or chat.

Every slot of the organizer's day is scored by where it lands in each place's day:

• Working hours (09:00 to 17:00 by default) score 1.
• Just outside (07:00 to 09:00 and 17:00 to 20:00) score a half.
• Late evening (20:00 to 23:00) scores a quarter.
• Night (23:00 to 07:00) scores nothing.

The slot's score is the average across everyone. A perfect 1 is optimal: working hours for all. At least 0.75 is good, at least 0.5 possible, and anything lower poor. The three best slots become the suggestions, with ties going to the time where the worst-off person is best off. Each suggestion says why it was chosen, place by place.

Each column is an hour of the organizer's day, or a half hour when someone is on a half-hour time zone. Each row is a place, with its local hour in every cell, shaded from solid ink for working hours to plain for night. The Fit row on top grades each column with a bar: the taller, the better.

The shading is in steps of lightness and pattern rather than colour, so it reads the same for colour-blind visitors, and every cell is labelled for screen readers. On a phone, the grid scrolls sideways with the place names pinned.

Some combinations have no slot that suits everyone: New York, London and Bangalore, for example, have no shared working hour. The planner then shows the best it can and says so. Options:

• Widen working hours above, if people are willing to start early or stay late.
• Split into two shorter meetings, each with the places that overlap.
• Rotate a regular meeting so the same people aren't always joining at night.

More ideas in scheduling across time zones.

The planner works out every place's offset for the date you pick, using the time zone data in your browser.^[1] If anyone's clocks change that day, it warns you.

Recurring meetings need extra care. Calendars keep a recurring meeting at the organizer's local time,^[2] and the US and Europe change their clocks on different weekends,^{[3, 4]} so for a few weeks each year the meeting moves by an hour for some people. Check the dates in the DST change tracker.

India is on UTC+5:30 and Nepal on UTC+5:45, and several other places use half-hour offsets.^[5] When any of your places does, the grid switches to half-hour slots so suggestions can land on :30. Times on a 45-minute offset are taken down to the half hour when scoring, so 08:45 counts as before a 09:00 start.

The planner works in your browser. The places you've added recently are remembered in this browser only, to offer them again. No account is needed.

When you copy, share, save or add a meeting to your calendar, we add one to a count of how often those cities are planned together. The count says nothing about who planned it: no account, address or meeting time is kept with it. It's what fills "People also schedule" on the city pair pages.

If you sign in, meetings you save and your favorite places are kept in your account, so they're there on any device. You can delete them from My meetings.

• Time zone converter

  Convert any date and time between two places, with the working shown and daylight saving handled.

• Meeting cost calculator

  Work out what a meeting costs in people's time, per meeting and per year, from salaries or hourly rates.

• World clock

  The time right now in every UTC offset in use, west to east, with your own cities pinned on top.

• UTC offset calculator

  Find the UTC offset of any place on any date, or every place on an offset, in every notation.

• DST change tracker

  Every clock change worldwide in the next 12 months, your places' next change, and when two places' gap shifts.

1. 1.IANA, Time Zone Database. Each place's offsets and clock changes, which the planner reads from your browser.
2. 2.IETF, RFC 5545: Internet Calendaring and Scheduling (iCalendar). Recurring calendar events keeping the organizer's local time.
3. 3.U.S. Department of Transportation, Daylight Saving Time. US change dates.
4. 4.EUR-Lex, Directive 2000/84/EC on summer-time arrangements. EU change dates.
5. 5.Wikipedia, List of UTC offsets. The half-hour and 45-minute offsets in use.