Time-zone converter and meeting planner
To plan a meeting across time zones, fix the single moment you want, then read it in each attendee's zone. This tool takes one date and time in a source zone, converts it to an absolute instant, and shows that instant in every city you pick, flagging whether it lands in normal working hours of 9am to 6pm locally. Daylight saving is handled automatically because each zone's own rules are applied for the date you choose, so a London-to-New-York meeting reads correctly whether or not the clocks have changed.
Enter the time and the zone it is in, then pick the cities you want to see it in. Hold Ctrl or Cmd to choose several. The working-hours flag gives a quick read on whether the slot suits everyone.
How this is worked out
The tool fixes the single moment you enter, then re-displays that same instant in each chosen zone using your browser's built-in time-zone database.
your time + source zone = one absolute moment (UTC)
that moment is then formatted in each target zone
daylight saving is handled automatically because each zone's rules are applied for that date
A green flag means the converted time falls between 09:00 and 18:00 local, a reasonable working-hours window for a meeting. Zone rules come from the IANA time-zone database shipped with your browser. Always confirm with attendees, since some regions change their clock-change rules.
Planning around UK days off too? See the 2026 UK bank holidays or the full calculator set.
Zone rules come from the IANA time-zone database in your browser. Confirm with attendees, as some regions change their clock-change rules.
Common questions
How does the converter handle daylight saving?
It applies each zone’s own daylight-saving rules for the date you pick, using the IANA time-zone database in your browser, so a converted time reads correctly whether or not the clocks have changed in that country on that date.
What does the working-hours flag mean?
The flag shows whether the converted time lands within normal working hours of 9am to 6pm in each city. It gives a quick read on whether a meeting slot suits everyone before you send the invite.
Can I convert one time into several cities at once?
Yes. Enter the time and the zone it is in, then pick as many target cities as you like, holding Ctrl or Cmd to select several, to see the same moment in each one side by side.
Why might a converted time still be slightly off?
Some regions change their clock-change rules from year to year, and the tool relies on the time-zone data in your browser. For anything important, confirm the local time directly with the attendees.
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Editor, Dates & Times
Oliver Mackman is the named editor of Dates & Times and a director of Best Business Loans Ltd (Companies House 16833937), the company that operates the site. He is accountable for its editorial standards, sourcing and corrections, and requires every result to cite the underlying date maths and the official UK source behind it, such as the gov.uk Bank Holidays API.
Last reviewed: 12 June 2026