Historically distinct IANA time zone
Australia/Perth
- Countries
- Ashmore and Cartier Islands
- GPS reference
- 31.95° S, 115.85° E
- Data source
- IANA australasia
- Aliases
- Australia/West
- Rule groups
- , AW
Ashmore and Cartier IslandsWestern Australia (most areas)
Geographic context
Where this clock belongs
The map marks the IANA reference location and associated country, not a time-zone boundary.
GPS reference: 31.95° S, 115.85° E. Associated countries: AU.
The Wikipedia link provides additional context; it is not evidence for a historical claim. Transition data comes from the IANA source file.
Notes from the time database
The story behind the clock
These source notes describe a period or rule. They do not, by themselves, establish a causal claim for a particular clock change.
Western Australia
Original IANA source file: australasia.
Civil-time record
Recorded changes over time
From 1895 to 2009 · 19 recorded transitions
Recurring daylight-saving changes are grouped separately when JavaScript is available.
Notable changes
One-off changes and transitions outside the recurring seasonal rhythm.
- +08:00 · AWSTStandard time applies
- +09:00 · AWDTDaylight saving time begins
- +08:00 · AWSTStandard time applies
- +09:00 · AWDTDaylight saving time begins
- +08:00 · AWSTStandard time applies
- +09:00 · AWDTDaylight saving time begins
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1895-12-01 00:16 | +08:00 | AWST | Standard time |
| 1917-01-01 03:00 | +09:00 | AWDT | Daylight saving time |
| 1917-03-25 02:00 | +08:00 | AWST | Standard time |
| 1942-01-01 03:00 | +09:00 | AWDT | Daylight saving time |
| 1942-03-29 02:00 | +08:00 | AWST | Standard time |
| 1942-09-27 03:00 | +09:00 | AWDT | Daylight saving time |
| 1943-03-28 02:00 | +08:00 | AWST | Standard time |
| 1974-10-27 03:00 | +09:00 | AWDT | Daylight saving time |
| 1975-03-02 02:00 | +08:00 | AWST | Standard time |
| 1983-10-30 03:00 | +09:00 | AWDT | Daylight saving time |
| 1984-03-04 02:00 | +08:00 | AWST | Standard time |
| 1991-11-17 03:00 | +09:00 | AWDT | Daylight saving time |
| 1992-03-01 02:00 | +08:00 | AWST | Standard time |
| 2006-12-03 03:00 | +09:00 | AWDT | Daylight saving time |
| 2007-03-25 02:00 | +08:00 | AWST | Standard time |
| 2007-10-28 03:00 | +09:00 | AWDT | Daylight saving time |
| 2008-03-30 02:00 | +08:00 | AWST | Standard time |
| 2008-10-26 03:00 | +09:00 | AWDT | Daylight saving time |
| 2009-03-29 02:00 | +08:00 | AWST | Standard time |