Timezone Converter

About this tool

Convert a single point in time across multiple timezones at once. Enter a date and time (or a Unix timestamp), pick the source timezone, and each target timezone shows its local date and time, UTC offset and whether it falls within working hours (09:00–18:00). Daylight saving time is handled automatically, and everything runs in your browser.

How to use
  1. Enter a date and time, or a Unix timestamp; use the “Now” button to jump to the current moment.
  2. Pick the source timezone (defaults to your browser timezone).
  3. Add or remove target timezones and compare their local times, UTC offsets and working-hour marks.
Why do I need timezone conversion, and how is daylight saving time handled?

A single instant maps to different wall-clock times in different regions. Daylight saving time shifts offsets by an hour in many places, so a fixed offset would be wrong; this tool uses the browser's timezone database to apply the correct offset for the exact date.

How is my browser timezone determined?

The source timezone defaults to the zone reported by your browser. You can change it to any zone in the list.

Is my time uploaded to a server?

No. All conversions happen locally in your browser; nothing is sent anywhere.