Date & Time Tools
Time Zone Converter
Convert any moment between time zones. Add multiple cities, see the same instant side by side, and get GMT offsets, DST, and ISO timestamps.
Source moment
Convert the current moment to every selected zone.
Live source time
Mon, May 18, 2026, 16:41
UTC UTC+00:00
Target zones
Add any IANA time zone. Each row updates with the same instant in that zone.
UTC
UTC UTC+00:00Same offset as source
Same calendar dayMon, May 18, 2026, 16:41
Local format
Mon, May 18, 2026, 16:41
ISO with offset
2026-05-18T16:41:09Z
America/New_York
EDT UTC-04:004 hours behind source
Same calendar dayMon, May 18, 2026, 12:41
Local format
Mon, May 18, 2026, 12:41
ISO with offset
2026-05-18T12:41:09-04:00
America/Los_Angeles
PDT UTC-07:007 hours behind source
Same calendar dayMon, May 18, 2026, 09:41
Local format
Mon, May 18, 2026, 09:41
ISO with offset
2026-05-18T09:41:09-07:00
Europe/London
GMT+1 UTC+01:001 hour ahead of source
Same calendar dayMon, May 18, 2026, 17:41
Local format
Mon, May 18, 2026, 17:41
ISO with offset
2026-05-18T17:41:09+01:00
Asia/Tokyo
GMT+9 UTC+09:009 hours ahead of source
Next day in targetTue, May 19, 2026, 01:41
Local format
Tue, May 19, 2026, 01:41
ISO with offset
2026-05-19T01:41:09+09:00
Source as ISO 8601
2026-05-18T16:41:09Z
Same instant, expressed with the source zone offset. Useful for calendar invites and ISO timestamps.
Conversions use your browser's built-in IANA time zone database and apply daylight saving time automatically. Nothing you type is sent to a server.
How to use
- Pick the source zone and choose Right now or Custom date and time.
- Add or remove IANA target zones using the search box, or click Reset to defaults.
- Read the wall-clock time, GMT offset, and day-shift badge for each target zone.
- Use any Copy button to copy a formatted time or the ISO string with offset.
About this tool
Time Zone Converter shows the same instant in every zone you care about, side by side. Pick a source zone and either use the current time or enter a custom date and time, then add IANA zones like America/New_York, Europe/London, or Asia/Tokyo to see when that moment lands in each one. The tool reports the GMT offset, the zone abbreviation, whether the calendar day shifts forward or back, and how many hours each target is ahead of or behind the source. It uses your browser's built-in IANA time zone database, so daylight saving time is applied automatically and accurately, including across DST boundaries. ISO 8601 strings with the correct offset are produced for each zone, ready to drop into calendar invites or API payloads. Conversions run entirely in your browser, so meeting times and travel plans never leave your device.
Free to use. Works in your browser. No signup, no login.
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