Perth’s planetary hours run on Western Australian time, with no daylight saving since 2009
Western Australia keeps AWST (UTC+8) all year. Its last trial of daylight saving ran over three summers from December 2006 to March 2009, and a referendum in 2009 ended it. For anyone born in Perth in those summers, the calculator adds the extra hour from the time zone records.
At 32° south, Perth’s hours swing much as Sydney’s do. Sunrise ranges from 05:03 on 28 November to 07:17 on 24 June, and sunset from 17:18 in early June to 19:26 in early January.
Perth lies at 115.9° east, about 4° west of the 120° meridian that sets AWST, so its solar noon falls between 12:00 and 12:31 through the year.
| Date | Sunrise | Sunset | Day hour | Night hour |
|---|---|---|---|---|
| 20 March | 06:19 | 18:29 | 61 min | 59 min |
| 21 June | 07:16 | 17:19 | 50 min | 70 min |
| 23 September | 06:06 | 18:12 | 61 min | 59 min |
| 21 December | 05:06 | 19:21 | 71 min | 49 min |
Times are local clock times from this calculator, with daylight saving applied where Perth uses it. Each planetary hour is one twelfth of the daylight or one twelfth of the night, so these two lengths set every hour of the day.
Born in Perth? Enter your birth date and time to see your hour
Leave the city on Perth, set your birth date and type your birth time into the time field. The panel names your hour and the dial turns to the planetary day you were born in. Western Australia ran daylight saving from December 2006 to March 2009, and the calculator applies it automatically for birth dates in those summers. A birth before sunrise belongs to the night of the previous day, and the panel tells you when that applies.