Planetary hours
in Perth.
The day, from sunrise to sunset, is cut into twelve equal hours; so is the night, from sunset to the next sunrise. Each hour carries a planet, in the Chaldean order. A planetary hour therefore lasts 60 minutes only at the equinoxes: it all depends on the date and the city. Here are the exact hours for your city; what you do with them is up to you.
Planetary day of Wednesday, 21 January 2026: day of Mercury
- Sunrise
- 05:30
- Sunset
- 19:24
- Next sunrise
- 05:31
A day hour lasts 1h 09m; a night hour, 51 min. Local time (Australia/Perth).
Day
- 1☿︎ Mercury05:30 – 06:40
- 2☽︎ Moon06:40 – 07:49
- 3♄︎ Saturn07:49 – 08:59
- 4♃︎ Jupiter08:59 – 10:08
- 5♂︎ Mars10:08 – 11:18
- 6☉︎ Sun11:18 – 12:27
- 7♀︎ Venus12:27 – 13:37
- 8☿︎ Mercury13:37 – 14:46
- 9☽︎ Moon14:46 – 15:55
- 10♄︎ Saturn15:55 – 17:05
- 11♃︎ Jupiter17:05 – 18:14
- 12♂︎ Mars18:14 – 19:24
Night
- 1☉︎ Sun19:24 – 20:14
- 2♀︎ Venus20:14 – 21:05
- 3☿︎ Mercury21:05 – 21:56
- 4☽︎ Moon21:56 – 22:46
- 5♄︎ Saturn22:46 – 23:37
- 6♃︎ Jupiter23:37 – 00:28
- 7♂︎ Mars00:28 – 01:18
- 8☉︎ Sun01:18 – 02:09
- 9♀︎ Venus02:09 – 02:59
- 10☿︎ Mercury02:59 – 03:50
- 11☽︎ Moon03:50 – 04:41
- 12♄︎ Saturn04:41 – 05:31
Other cities · Australia
Questions
How are the planetary hours calculated in Perth?
On Wednesday, 21 January 2026, the Sun rises at 05:30 and sets at 19:24: the day lasts 13h 53m, that is twelve day hours of 1h 09m. The night, until the next sunrise at 05:31, lasts 10h 08m: twelve night hours of 51 min.
Which planet rules the first hour that day?
Mercury, from 05:30 to 06:40: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury again.
Today’s sky, on YOUR chart
Planetary hours are the same for everyone in a city. Your chart is yours alone: every morning AstroXP crosses the real sky with your birth, to the minute, and tells you what time it plays out for you.
On a computer? Scan this code with your phone.
Calendars
Sunrise and sunset calculated for the city (the Sun’s centre 0°50′ below the horizon: refraction and semi-diameter), local time of the city’s time zone. Checked against astronomy-engine, the app’s engine.