Free Tool
Timezone Converter
Convert a date and time across any number of IANA timezones. Handles daylight saving time automatically. Supports all standard timezone identifiers.
Timezone Converter
Conversions
UTC GMT
Fri, Apr 24, 2026, 15:34:00 UTC
America/New_York GMT-4
Fri, Apr 24, 2026, 11:34:00 EDT
Europe/London GMT+1
Fri, Apr 24, 2026, 16:34:00 GMT+1
Asia/Kolkata GMT+5:30
Fri, Apr 24, 2026, 21:04:00 GMT+5:30
IANA timezones and DST
IANA timezone identifiers (like America/New_York or Asia/Kolkata) encode both the UTC offset and daylight saving time rules for every historical and future transition. This tool uses the browser's Intl API to resolve the correct offset for any given date, so DST is handled automatically.
How to use
- Select a date and time, or click Now for the current moment.
- Choose the source timezone from the dropdown.
- View the converted time in each target timezone.
- Type a timezone name (e.g. Asia/Tokyo) and click Add to include it.
- Click Copy all to copy all conversions as plain text.
All conversions happen in your browser — no data is sent to any server.
Frequently Asked Questions
- Does this handle daylight saving time?
- Yes. The browser's Intl.DateTimeFormat API automatically applies DST rules for any given date and timezone.
- What format are timezone names in?
- IANA timezone identifiers — the same format used by Linux, macOS, Node.js, Python, Java, and most databases. Examples: America/New_York, Europe/London, Asia/Kolkata.