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Time Zone Converter

Time Zone Converter

Convert time between different time zones worldwide with automatic DST handling

Convert Time

Examples

Convert UTC noon to Tokyo

Input
Browser time zone: UTC
Date & time: 2026-01-15 12:00
From: UTC
To: Asia/Tokyo
Output
2026-01-15 21:00

The built-in Tokyo offset is UTC+9.

Convert UTC noon to New York

Input
Browser time zone: UTC
Date & time: 2026-01-15 12:00
From: UTC
To: America/New_York
Output
2026-01-15 07:00

The tool always applies its fixed UTC−5 New York offset, including dates when daylight saving could apply.

Convert UTC noon to India

Input
Browser time zone: UTC
Date & time: 2026-01-15 12:00
From: UTC
To: Asia/Kolkata
Output
2026-01-15 17:30

The converter supports India's half-hour UTC+5:30 offset.

About this tool

Time Zone Converter converts a date and minute between 15 built-in zones and shows a compact world clock for the same set. The list covers UTC, major US and European cities, Istanbul, Dubai, Tokyo, Shanghai, Singapore, India, Sydney, and Auckland, with a one-click control for swapping source and destination zones.

The current implementation parses the input as a browser-local Date, then performs arithmetic with a fixed numeric offset stored for each zone and formats the result as YYYY-MM-DD HH:mm. It does not consult the IANA time-zone database or calculate daylight-saving transitions, despite displaying familiar IANA zone names and seasonal abbreviation labels.

Conversion updates immediately when the date, source, or destination changes. The result can be copied, and the page initializes the input to the browser's current local date and time.

How to use

  1. Select the source zone

    Choose the zone whose wall-clock date and time you are entering from the From Time Zone list.

  2. Select the destination zone

    Choose one of the 15 destination zones, or use Swap Time Zones to reverse the two selections.

  3. Enter a date and time

    Use the datetime-local field. The result updates automatically and is displayed without seconds as YYYY-MM-DD HH:mm.

  4. Copy or compare

    Copy the converted result, or scan the static world-clock list to compare all supported zones at once.

Use cases

Coordinate a small international meeting

Translate a proposed UTC time into one of the listed city zones before sending an invitation.

Read UTC log timestamps

Convert a UTC event time to a supported fixed-offset city for quick operational context.

Compare distributed-team hours

Use the world-clock panel for an at-a-glance comparison across all 15 supported locations.

Check half-hour offsets

Convert UTC values to India, whose built-in offset includes an additional 30 minutes.

Common mistakes

Mistake:Assuming the converter handles daylight-saving time automatically.

Fix:It uses fixed offsets only. Verify dates affected by DST with an IANA-aware time-zone library or platform formatter.

Mistake:Assuming the selected source zone is independent of the browser's own time zone.

Fix:The datetime-local value is first parsed in the browser's local zone before fixed offsets are applied, so identical inputs can differ by device. Use an IANA-aware converter for portable results.

Mistake:Treating the output as an ISO 8601 timestamp.

Fix:The result is a display string without a T separator, seconds, or UTC offset. Add the correct offset before storing or transmitting it.

Mistake:Using the world clock as a continuously updating clock.

Fix:Its values are computed once when the component initializes. Reload the page when you need a fresh comparison.

Frequently asked questions

References & standards

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