tzdata rule group

AT

Active or recent rule group · 2 represented zones

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

First rule: 1916
Last rule: 2026 or later
Rule entries: 23
Source files: australasia

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.

1971–2026

Rule context

Tasmania says King Island didn't observe DST from WWII until late 1971.

Original rule fields

Recorded rule entries

Structured directly from tzdata’s Rule lines.

From	To	Type	In	On	At	Save
1916	only	-	Oct	Sun>=1	2:00s	1:00
1917	only	-	Mar	lastSun	2:00s	0
1917	1918	-	Oct	Sun>=22	2:00s	1:00
1918	1919	-	Mar	Sun>=1	2:00s	0
1967	only	-	Oct	Sun>=1	2:00s	1:00
1968	only	-	Mar	Sun>=29	2:00s	0
1968	1985	-	Oct	lastSun	2:00s	1:00
1969	1971	-	Mar	Sun>=8	2:00s	0
1972	only	-	Feb	lastSun	2:00s	0
1973	1981	-	Mar	Sun>=1	2:00s	0
1982	1983	-	Mar	lastSun	2:00s	0
1984	1986	-	Mar	Sun>=1	2:00s	0
1986	only	-	Oct	Sun>=15	2:00s	1:00
1987	1990	-	Mar	Sun>=15	2:00s	0
1987	only	-	Oct	Sun>=22	2:00s	1:00
1988	1990	-	Oct	lastSun	2:00s	1:00
1991	1999	-	Oct	Sun>=1	2:00s	1:00
1991	2005	-	Mar	lastSun	2:00s	0
2000	only	-	Aug	lastSun	2:00s	1:00
2001	max	-	Oct	Sun>=1	2:00s	1:00
2006	only	-	Apr	Sun>=1	2:00s	0
2007	only	-	Mar	lastSun	2:00s	0
2008	max	-	Apr	Sun>=1	2:00s	0