Planetary hours
in Leuven.
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 Tuesday, 9 December 2025: day of Mars
- Sunrise
- 08:31
- Sunset
- 16:35
- Next sunrise
- 08:32
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/Brussels).
Day
- 1♂︎ Mars08:31 – 09:12
- 2☉︎ Sun09:12 – 09:52
- 3♀︎ Venus09:52 – 10:32
- 4☿︎ Mercury10:32 – 11:12
- 5☽︎ Moon11:12 – 11:53
- 6♄︎ Saturn11:53 – 12:33
- 7♃︎ Jupiter12:33 – 13:13
- 8♂︎ Mars13:13 – 13:54
- 9☉︎ Sun13:54 – 14:34
- 10♀︎ Venus14:34 – 15:14
- 11☿︎ Mercury15:14 – 15:55
- 12☽︎ Moon15:55 – 16:35
Night
- 1♄︎ Saturn16:35 – 17:55
- 2♃︎ Jupiter17:55 – 19:14
- 3♂︎ Mars19:14 – 20:34
- 4☉︎ Sun20:34 – 21:54
- 5♀︎ Venus21:54 – 23:14
- 6☿︎ Mercury23:14 – 00:34
- 7☽︎ Moon00:34 – 01:53
- 8♄︎ Saturn01:53 – 03:13
- 9♃︎ Jupiter03:13 – 04:33
- 10♂︎ Mars04:33 – 05:53
- 11☉︎ Sun05:53 – 07:12
- 12♀︎ Venus07:12 – 08:32
Other cities · Belgium
Questions
How are the planetary hours calculated in Leuven?
On Tuesday, 9 December 2025, the Sun rises at 08:31 and sets at 16:35: the day lasts 8h 04m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:32, lasts 15h 57m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
Mars, from 08:31 to 09:12: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.