tzdata rule group
NZ
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
- 1927
- Last rule
- 2026 or later
- Rule entries
- 16
- 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.
Since 1957 Chatham has been 45 minutes ahead of NZ, but until 2018a there was no documented single notation for the date and time of this transition. Duplicate the Rule lines for now, to give the 2018a change time to percolate out.
Where it appears
Zones using NZ
Only historically distinct canonical zones from this atlas are listed.
Antarctica
New ZealandOriginal rule fields
Recorded rule entries
Structured directly from tzdata’s Rule lines.
| From | To | Type | In | On | At | Save |
|---|---|---|---|---|---|---|
| 1927 | only | - | Nov | 6 | 2:00 | 1:00 |
| 1928 | only | - | Mar | 4 | 2:00 | 0 |
| 1928 | 1933 | - | Oct | Sun>=8 | 2:00 | 0:30 |
| 1929 | 1933 | - | Mar | Sun>=15 | 2:00 | 0 |
| 1934 | 1940 | - | Apr | lastSun | 2:00 | 0 |
| 1934 | 1940 | - | Sep | lastSun | 2:00 | 0:30 |
| 1946 | only | - | Jan | 1 | 0:00 | 0 |
| 1974 | only | - | Nov | Sun>=1 | 2:00s | 1:00 |
| 1975 | only | - | Feb | lastSun | 2:00s | 0 |
| 1975 | 1988 | - | Oct | lastSun | 2:00s | 1:00 |
| 1976 | 1989 | - | Mar | Sun>=1 | 2:00s | 0 |
| 1989 | only | - | Oct | Sun>=8 | 2:00s | 1:00 |
| 1990 | 2006 | - | Oct | Sun>=1 | 2:00s | 1:00 |
| 1990 | 2007 | - | Mar | Sun>=15 | 2:00s | 0 |
| 2007 | max | - | Sep | lastSun | 2:00s | 1:00 |
| 2008 | max | - | Apr | Sun>=1 | 2:00s | 0 |