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.

IANA zones, DST, and the same instant

Each region uses an IANA time zone database name (for example America/Los_Angeles) so daylight saving rules apply on the right dates. Fixed offsets alone cannot express DST—prefer named zones when you schedule recurring meetings or interpret logs.

To compare the same instant with Unix APIs or logs stored in UTC, use the Unix timestamp converter for epoch seconds or ISO strings, then return here for human-readable zone labels.

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)

2026-05-29T14:51:09.993Z

America/New_York

Friday, May 29, 2026 at 10:51:09 AM EDT

Europe/London

Friday, May 29, 2026 at 3:51:09 PM GMT+1

Nearby workflows on Toolcore

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.

Common search terms

Phrases people search for that match this tool. See the full long-tail keyword index.

  • world clock comparison
  • iana timezone converter
  • compare timezones side by side

More tools

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