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Kordu Tools
Time & Date Runs in browser Popular Updated 30 Mar 2026

Timezone Converter

Convert times between timezones and compare up to four zones side by side.

Source time

UTC+01:00

Converted times

23 Apr 2026, 11:52:00 UTC

UTC+00:00

All timezone conversions use your browser's built-in Intl API with IANA timezone data. Daylight saving time transitions are handled automatically.
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How to use Timezone Converter

  1. Set your source timezone and time

    Choose a timezone from the searchable dropdown and enter the date and time you want to convert, or click 'Use current time' to start from now.

  2. View the first conversion

    The default target timezone shows the converted date, time, and current UTC offset immediately. The offset updates automatically for DST transitions.

  3. Add more timezones

    Click 'Add timezone' to compare across up to four zones simultaneously. Each zone shows the equivalent local time and its UTC offset.

  4. Check for DST changes

    Try dates around spring and autumn to see how DST transitions affect the offset. The tool applies the correct pre- or post-transition offset automatically.

  5. Remove zones you don't need

    Click the remove button on any timezone card to dismiss it. The remaining zones update instantly.

Timezone Converter FAQ

Does it handle daylight saving time?
Yes. The converter uses the browser's built-in IANA timezone database, which includes all current and historical DST transition rules. UTC offsets update automatically based on the date you select — no manual adjustment needed.

What happens around DST transition dates?
The IANA database covers every timezone's transition dates and times. Set a date near a DST change and the tool will correctly apply the pre- or post-transition offset. Clocks spring forward or fall back automatically.

How many timezones can I compare at once?
Up to four target timezones can be displayed simultaneously alongside your source timezone.

What timezone format does it use?
IANA timezone identifiers such as 'Europe/London' or 'America/New_York'. These are the standard identifiers used by operating systems, programming languages, and databases.

What is the difference between UTC and GMT?
UTC (Coordinated Universal Time) is the primary time standard and is never affected by daylight saving. GMT (Greenwich Mean Time) is UTC+0 but is technically a timezone. In practice they show the same offset but UTC is the correct reference for computing purposes.

How do I find the best meeting time for multiple countries?
Add one timezone per participant, set your preferred start time in your local timezone, and compare the equivalent times. Look for a time where all zones fall within working hours (typically 09:00–17:00).

Can I convert historical or future dates?
Yes. Set any past or future date and the tool applies the correct UTC offset for that date in each timezone, including historical DST rules where applicable.

Does it support half-hour and 45-minute offset timezones?
Yes. All IANA timezone identifiers are supported, including UTC+5:30 (India), UTC+5:45 (Nepal), UTC+9:30 (Australia Central), and similar non-standard offsets.

Is any data sent to a server?
No. All timezone calculations use the browser's built-in Intl API and IANA database. Nothing is transmitted.

Background

Convert a date and time from one timezone to another, or compare across up to four timezones simultaneously. Select your source timezone and date/time, then add target timezones to see converted results instantly. Each zone displays its current UTC offset and a formatted date/time label. Use the "current time" button to start from now. Handles daylight saving time (DST) transitions automatically via the browser's built-in IANA timezone database — no manual offset adjustment needed. Useful for scheduling international meetings, checking business hours overlap, planning travel across time zones, or coordinating remote teams. Covers all IANA timezone identifiers including US, UK, European, Asian, and Australian zones. Everything runs locally — no data leaves your browser.

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