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 Sunday, 20 December 2026: day of the Sun
- Sunrise
- 08:40
- Sunset
- 16:36
- Next sunrise
- 08:41
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/Brussels).
Day
- 1☉︎ Sun08:40 – 09:20
- 2♀︎ Venus09:20 – 10:00
- 3☿︎ Mercury10:00 – 10:39
- 4☽︎ Moon10:39 – 11:19
- 5♄︎ Saturn11:19 – 11:59
- 6♃︎ Jupiter11:59 – 12:38
- 7♂︎ Mars12:38 – 13:18
- 8☉︎ Sun13:18 – 13:58
- 9♀︎ Venus13:58 – 14:37
- 10☿︎ Mercury14:37 – 15:17
- 11☽︎ Moon15:17 – 15:57
- 12♄︎ Saturn15:57 – 16:36
Night
- 1♃︎ Jupiter16:36 – 17:57
- 2♂︎ Mars17:57 – 19:17
- 3☉︎ Sun19:17 – 20:37
- 4♀︎ Venus20:37 – 21:58
- 5☿︎ Mercury21:58 – 23:18
- 6☽︎ Moon23:18 – 00:39
- 7♄︎ Saturn00:39 – 01:59
- 8♃︎ Jupiter01:59 – 03:19
- 9♂︎ Mars03:19 – 04:40
- 10☉︎ Sun04:40 – 06:00
- 11♀︎ Venus06:00 – 07:20
- 12☿︎ Mercury07:20 – 08:41
Other cities · Belgium
Questions
How are the planetary hours calculated in Leuven?
On Sunday, 20 December 2026, the Sun rises at 08:40 and sets at 16:36: the day lasts 7h 56m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:41, lasts 16h 04m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
The Sun, from 08:40 to 09:20: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.