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World Clock Meeting Planner — See Every Time Zone at Once

World clock meeting planner: pick a proposed time and instantly see every participant's local day and hour on one screen, then use the 24-hour overlap strip to find the window where the most people fall inside working hours. Add any city or IANA time zone, share the result with a link, and nothing is sent to any server.

Participants
#1
Proposed Meeting Time
Working Hours Window

Overlap finder highlights hours where all participants fall within this window.

Local times

ParticipantTime zoneLocal timeWorking hours
My locationEurope/MinskSun, Jul 26, 10:00In window

24-Hour Overlap Finder

Each block represents one hour of the day in the base participant's time zone. Green means all participants are within working hours. Amber means partial overlap. Neutral means no one is in their window.

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All in windowPartial overlapNo overlap

Working-Hours Overlap for Common City Pairs

The hours below are arithmetic from each city's standard-time UTC offset and a 9:00am–6:00pm working day — not a claim about anyone's actual schedule. During the one to four weeks each spring and autumn when the US and EU or Australia change their clocks on different dates, these numbers shift; add your own participants to the planner above for the current date.

City pairTime gapStandard-hours overlapOverlap window
San Francisco (PST, UTC-8) – London (GMT, UTC+0)8 hours1 hour9:00–10:00am PT = 5:00–6:00pm GMT
New York (EST, UTC-5) – Berlin (CET, UTC+1)6 hours3 hours9:00am–12:00pm ET = 3:00–6:00pm CET
London (GMT, UTC+0) – Bangalore (IST, UTC+5:30)5.5 hours3.5 hours9:00am–12:30pm GMT = 2:30–6:00pm IST
New York (EST, UTC-5) – Sydney (AEST, UTC+10)15 hoursNoneNo standard-hours overlap — the two working days do not touch

New York and Sydney share almost no standard working hours at all — a common pattern for teams split across the US and Asia-Pacific. See how to schedule a meeting across time zones for what to do when the overlap finder above comes back empty.

Why Use a World Clock Meeting Planner?

  • One world clock table for every participant — no converting one time zone at a time
  • DST-safe — uses the browser's Intl API so daylight saving changes are handled automatically
  • 24-hour overlap strip finds the best slot across the whole day, not just the one you typed
  • Reference table of standard-time overlap hours for common city pairs on this page
  • Shareable link encodes all inputs (no personal data) so the whole team sees the same clock
  • Copy summary exports a plain-text block ready to paste into Slack, email, or a calendar invite
  • 100% private — no data is sent to any server; everything runs in your browser
  • Works for any combination of cities, teams, or countries across all IANA time zones

Frequently Asked Questions

A world clock meeting planner is a tool that shows every meeting participant's local time side by side, the way a wall of office clocks shows the time in several cities at once, and then checks a proposed meeting time against each participant's working hours. This free planner adds a 24-hour overlap strip on top of the world clock view so you can also see which hour of the day gives the best working-hours overlap for the whole group.

A basic time zone converter answers one question: what time is it in city B when it is a given time in city A. A world clock shows every participant at once, and this planner goes further by scanning the full 24-hour day to highlight the hours where the largest number of participants fall inside working hours — a question a one-pair converter cannot answer on its own.

Yes. Every conversion uses the browser's Intl.DateTimeFormat API with each participant's IANA time zone identifier, so the correct UTC offset for the specific date you choose is applied automatically, including during DST transitions. See the DST section on the time zone meeting planner page for why the offset between two cities can shift by an hour for a few weeks each spring and autumn.

It depends entirely on the pair. San Francisco and London share only about an hour of standard working hours; New York and Berlin share roughly three; London and Bangalore share about three and a half. New York and Sydney share close to none. See the overlap table on this page for the exact hours, then add your own participants to the planner above to check any other pair.

Yes, completely free. Add participants, pick a time, and share the link — no account, no sign-up, and no usage limits. Everything runs in your browser.

No. The planner runs entirely in your browser. Participant labels, time zones, and meeting times are never sent to any server. The shareable link encodes participant labels and IANA time zone identifiers as URL query parameters — no names or identifying information are included.

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