How does it handle daylight saving?

All conversions use your browser's Intl.DateTimeFormat with explicit timeZone values, so DST is handled by your browser's timezone database.

Where does the timezone list come from?

It's a curated set of common IANA timezone identifiers (UTC, America/Los_Angeles, Europe/London, Asia/Tokyo, etc.). The source picker includes 22 zones.

Why is the source timezone detected automatically?

The tool reads Intl.DateTimeFormat().resolvedOptions().timeZone on load, which is your browser's local zone. You can override it in the dropdown.

Are times uploaded anywhere?

No. Everything is computed locally with Intl APIs — no network requests.

Can I copy a converted time?

Yes — each row has a Copy button that copies the formatted time plus the timezone id.

Timezone Converter

See one instant across the world's major timezones.

100% private — no uploads Unit & Data ConvertersFree & unlimited Read tutorial

See how it works

Watch a quick simulation of this tool in action — no file needed.

How to use Timezone Converter

Follow these steps — everything happens instantly in your browser.

1
Step 1. Pick a date and time and choose the source timezone.
2
Step 2. The UTC equivalent is shown at the top.
3
Step 3. Browse the same instant across major world timezones below.

Why use this tool

Frequently asked questions

Everything you might want to know about timezone converter.

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