tzdata rule group

EU

Active or recent rule group · 50 represented zones

A rule group describes recurring clock changes. It is not itself a place or an IANA time-zone identifier.

First rule: 1977
Last rule: 2026 or later
Rule entries: 6
Source files: europe

Notes from the time database

Context for this rule

These source notes are preserved from tzdata. They help explain a rule’s period, without adding claims beyond the source.

1981–2026

Rule context

The following rules are for the European Union and for its predecessor organization, the European Communities. For brevity they are called "EU rules" elsewhere in this file.

Original rule fields

Recorded rule entries

Structured directly from tzdata’s Rule lines.

From	To	Type	In	On	At	Save
1977	1980	-	Apr	Sun>=1	1:00u	1:00
1977	only	-	Sep	lastSun	1:00u	0
1978	only	-	Oct	1	1:00u	0
1979	1995	-	Sep	lastSun	1:00u	0
1981	max	-	Mar	lastSun	1:00u	1:00
1996	max	-	Oct	lastSun	1:00u	0

Context for this rule

Zones using EU

Recorded rule entries