Browse IANA timezones and local times

Browse IANA time-zone identifiers and see the current local clock for a filtered region.

freeworks offlinenothing uploaded
ToolTimezone List
Input
Output
—
Put this on your own site

The frame below runs the same code as this page, in the reader's own browser. Nothing is sent to us, and nothing is sent to you.

Pick a dark background and the text and panels follow it, so the frame stays readable on a dark page.

Preview

How it works

Intl.supportedValuesOf("timeZone") supplies the browser’s available IANA zone identifiers, with UTC added explicitly. Each identifier is passed to Intl.DateTimeFormat with a timeZone option, so the displayed clock uses the zone’s current daylight-saving and historical rules instead of a fixed offset table.

  • IANA identifiers such as Europe/Warsaw name rule sets, not a permanent UTC offset.
  • The list depends on the browser’s embedded time-zone database and may differ between runtime versions.

Worked example

Filter European Timezones
List all European timezones with current times
Input
											Europe
Output
												Europe/London                  13:45
Europe/Dublin                  13:45
Europe/Paris                   14:45
Europe/Berlin                  14:45
Europe/Madrid                  14:45
Europe/Rome                    14:45
Europe/Amsterdam               14:45
Europe/Brussels                14:45
Europe/Zurich                  14:45
Europe/Vienna                  14:45
Europe/Stockholm               14:45
Europe/Oslo                    14:45
Europe/Copenhagen              14:45
Europe/Helsinki                15:45
Europe/Warsaw                  14:45
Europe/Prague                  14:45
Europe/Budapest                14:45
Europe/Bucharest               15:45
Europe/Athens                  15:…

When to use this

World-clock menus, meeting schedulers, log viewers, and calendar applications use IANA zone identifiers.

Edge cases

  • A zone such as America/New_York changes offset across daylight-saving transitions, so its displayed time cannot be cached as one number.
  • UTC is not always returned by supportedValuesOf and is added explicitly to keep the zero-offset zone available.
  • Older browsers without Intl.supportedValuesOf use the smaller fallback list rather than claiming complete IANA coverage.

References