World clock & time zones

Client

Pick one moment using your device's local date and time, then read it in two regions—handy for meetings and log correlation.

Compare time zones

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Pick one instant (your browser's local time) and see how it reads in two IANA zones. Useful for meetings and log correlation.

Same instant (UTC)

2026-04-14T06:42:42.582Z

America/New_York

Tuesday, April 14, 2026 at 2:42:42 AM EDT

Europe/London

Tuesday, April 14, 2026 at 7:42:42 AM GMT+1

Common use cases

  • Schedule a meeting across regions: pick one instant and read it in two IANA zones.
  • Correlate log lines that use different zone labels by anchoring the same UTC instant.
  • Sanity-check daylight-saving transitions for a future date in each zone.

Common mistakes to avoid

  • Mixing fixed offsets with named zones

    A fixed offset ignores DST. Prefer named zones (for example Europe/Berlin) when rules change with the calendar.

  • Assuming abbreviations are unique

    Strings like CST can mean different regions. Use the full IANA identifier from the picker.

  • Forgetting leap seconds and edge cases

    Displayed local times follow your browser’s timezone database; extremely rare edge cases follow the same rules as your OS.

FAQ

Does this send my chosen time to a server?

No. Conversion uses APIs available in your browser tab only.

Which time zones are supported?

Standard IANA time zone names (for example America/New_York). Pick two from the lists to compare.

How does this relate to Unix timestamps?

Both describe the same instant. Use the timestamp tool if you need epoch seconds or ISO strings for APIs.

More tools

Related utilities you can open in another tab—mostly client-side.