tzdata rule group
Chatham
Active or recent rule group · 1 represented zone
A rule group describes recurring clock changes. It is not itself a place or an IANA time-zone identifier.
- First rule
- 1974
- Last rule
- 2026 or later
- Rule entries
- 9
- Source files
- australasia
Where it appears
Zones using Chatham
Only historically distinct canonical zones from this atlas are listed.
New ZealandOriginal rule fields
Recorded rule entries
Structured directly from tzdata’s Rule lines.
| From | To | Type | In | On | At | Save |
|---|---|---|---|---|---|---|
| 1974 | only | - | Nov | Sun>=1 | 2:45s | 1:00 |
| 1975 | only | - | Feb | lastSun | 2:45s | 0 |
| 1975 | 1988 | - | Oct | lastSun | 2:45s | 1:00 |
| 1976 | 1989 | - | Mar | Sun>=1 | 2:45s | 0 |
| 1989 | only | - | Oct | Sun>=8 | 2:45s | 1:00 |
| 1990 | 2006 | - | Oct | Sun>=1 | 2:45s | 1:00 |
| 1990 | 2007 | - | Mar | Sun>=15 | 2:45s | 0 |
| 2007 | max | - | Sep | lastSun | 2:45s | 1:00 |
| 2008 | max | - | Apr | Sun>=1 | 2:45s | 0 |