Civil Time AtlasIANA time zone data

tzdata rule group

Canada

Active or recent rule group · 23 represented zones

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

First rule
1918
Last rule
2026 or later
Rule entries
10
Source files
northamerica

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.

Where it appears

Zones using Canada

Only historically distinct canonical zones from this atlas are listed.

Original rule fields

Recorded rule entries

Structured directly from tzdata’s Rule lines.

FromToTypeInOnAtSave
1918only-Apr142:001:00
1918only-Oct272:000
1942only-Feb92:001:00
1945only-Aug1423:00u1:00
1945only-Sep302:000
19741986-AprlastSun2:001:00
19742006-OctlastSun2:000
19872006-AprSun>=12:001:00
2007max-MarSun>=82:001:00
2007max-NovSun>=12:000