Time Zone Converter

Convert a wall-clock time from one zone into many — DST-aware.

UTC / GMT

Base

UTC · UTC+00:00 · reference

03:44 AM

Sat, Oct 24

New York

DSTPrevious day

America/New_York · UTC-04:00 · 4h behind

11:44 PM

Fri, Oct 23

London

DST

Europe/London · UTC+01:00 · 1h ahead

04:44 AM

Sat, Oct 24

Tokyo

Business hours

Asia/Tokyo · UTC+09:00 · 9h ahead

12:44 PM

Sat, Oct 24

Day timeline in UTC / GMT

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Green = typical business hours (09–17). Accent mark = selected time.

Results

Shareable result

UTC / GMT: 03:44 AM

Export conversion

The base date and time are interpreted in the selected base zone, then converted with IANA daylight-saving rules. Day-change badges show when the converted calendar date differs.

How to use

Follow these steps to get a result

  1. Pick the base zone, date, and local wall-clock time.

  2. Add destination cities and switch the Base badge to compare from another city.

  3. Use Now for the current instant in the base zone, then copy or share the results.

Features

What this tool includes

  • IANA DST-aware conversion

  • Day-change and relative offset badges

  • Business-hours markers and day timeline

  • Shareable URL with zones, date, and time

  • Export as Copy, CSV, text, or PDF

FAQ

Common questions about this tool

A 9:00 start in Tokyo can still be the previous evening in New York. The converter marks previous/next day explicitly.

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Continue with something nearby

Time zone rules come from the IANA time zone database; daylight saving changes are applied automatically. Methodology · Data sources