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 Monday, 21 December 2026: day of the Moon
- Sunrise
- 08:41
- Sunset
- 16:37
- Next sunrise
- 08:41
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/Brussels).
Day
- 1☽︎ Moon08:41 – 09:20
- 2♄︎ Saturn09:20 – 10:00
- 3♃︎ Jupiter10:00 – 10:40
- 4♂︎ Mars10:40 – 11:19
- 5☉︎ Sun11:19 – 11:59
- 6♀︎ Venus11:59 – 12:39
- 7☿︎ Mercury12:39 – 13:18
- 8☽︎ Moon13:18 – 13:58
- 9♄︎ Saturn13:58 – 14:38
- 10♃︎ Jupiter14:38 – 15:17
- 11♂︎ Mars15:17 – 15:57
- 12☉︎ Sun15:57 – 16:37
Night
- 1♀︎ Venus16:37 – 17:57
- 2☿︎ Mercury17:57 – 19:17
- 3☽︎ Moon19:17 – 20:38
- 4♄︎ Saturn20:38 – 21:58
- 5♃︎ Jupiter21:58 – 23:19
- 6♂︎ Mars23:19 – 00:39
- 7☉︎ Sun00:39 – 01:59
- 8♀︎ Venus01:59 – 03:20
- 9☿︎ Mercury03:20 – 04:40
- 10☽︎ Moon04:40 – 06:01
- 11♄︎ Saturn06:01 – 07:21
- 12♃︎ Jupiter07:21 – 08:41
Other cities · Belgium
Questions
How are the planetary hours calculated in Leuven?
On Monday, 21 December 2026, the Sun rises at 08:41 and sets at 16:37: the day lasts 7h 56m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:41, lasts 16h 05m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
The Moon, from 08:41 to 09:20: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Saturn, Jupiter, Mars, the Sun, Venus, Mercury, then the Moon 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.