DST / time zone change checker

Does a time zone change clocks this year? See the exact spring-forward and fall-back instants and the offsets on either side.

e.g. America/New_York, Europe/Berlin — pick from the list or type it.

Checked in this browser with the device's time zone database — nothing is sent anywhere.

Reads the IANA zone data built into the browser (the same rules your OS uses). Historical years before 1970 may be approximate. Shows clock change instants and the offsets on either side — it can't tell you what a specific country's lawmakers will decide next year.

How to use

  1. Pick or type an IANA time zone.
  2. Enter a year.
  3. Read whether DST applies, the change dates, and current status.

What it supports

Reads the browser's built-in IANA zone data (the same rules your OS uses). Years 1970–2100; earlier years can be approximate. Shows change instants and offsets — it can't predict next year's legislation.

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