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World Clock and Time Zone Converter

World Clock and Time Zone Converter

Compare current city times and UTC offsets, then convert a date and time across saved time zones.

Focus mode

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Key features

  • Searches IANA time zones and adds multiple city clocks.
  • Shows the current date, time, and UTC offset for each zone.
  • Switches between 12-hour and 24-hour time.
  • Converts a wall-clock date and time from one zone to saved target zones.

How to use

  1. Search for a city or IANA time-zone name and add it.
  2. Compare the current times and UTC offsets.
  3. Open Time Conversion and choose a source zone, date, and time.

Examples

  • Compare work hours across regions

    View current time and UTC offset for several saved cities on one screen.

  • Convert a meeting time

    Enter a date and time in the source zone and review local times in saved target zones.

Privacy

Clock calculations use the device's Intl time-zone data; saved zones and hour format are stored in the browser.

Requirements

Available regions depend on the browser's IANA time-zone data. If a DST transition repeats a local time, conversion uses the first occurrence; nonexistent local times are not converted.

Common questions

Will added cities remain for my next visit?
Yes. Selected IANA time zones and the 12 or 24-hour display preference are kept in this browser's local storage.
Does conversion handle daylight-saving transitions?
It applies offsets from the browser's IANA time-zone data. Nonexistent local times are rejected, and the first occurrence is used when a local time repeats.

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