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Timezone Converter

Convert any time across multiple IANA timezones at once. DST-aware via the browser's Intl API. Add your team's zones, get live clocks, share meeting times.

  • Runs in browser
  • No signup
  • No tracking
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How to use Timezone Converter

  1. Set the source time and source timezone.

  2. Add target zones from the dropdown.

  3. Read each target's local time and offset.

  4. Copy a single zone or share the URL.

When to use it

  • Scheduling meetings across distributed teams.

  • Planning product launches in multiple regions.

  • Reading server logs in your local time.

  • Coordinating a stream / event across continents.

What it fixes

  • GMT offsets going stale across DST transitions.

  • Mental math 'New York minus 5 hours' that's wrong in summer.

  • Calendar invites that show wrong times to remote teammates.

About Timezone Converter

Scheduling across timezones is fragile. Half the bugs come from using fixed GMT offsets that drift twice a year on DST transitions. Modern code uses IANA timezone identifiers (`America/New_York`, `Europe/London`) — and so does this converter.

Set a source time in any zone, add as many target zones as you want, and read each one's local time live. The URL hash captures the state so you can paste it into a calendar invite or chat.

References: IANA Time Zone Database · MDN — Intl.DateTimeFormat

Frequently asked

  • How is DST handled?

    We use the IANA timezone database via the browser's Intl API, which handles DST transitions correctly for past, present, and future dates.

  • Why use IANA names instead of GMT offsets?

    GMT offsets ignore DST. 'America/New_York' is correct year-round; 'GMT-5' is wrong half the year. IANA names are the only safe identifier.

  • Can I share a converted time?

    Yes — the URL updates as you change the source time and zone. Share the link to show others the same instant in their browser.

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