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, 15 December 2026: day of Mars
- Sunrise
- 08:37
- Sunset
- 16:35
- Next sunrise
- 08:37
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/Brussels).
Day
- 1♂︎ Mars08:37 – 09:17
- 2☉︎ Sun09:17 – 09:56
- 3♀︎ Venus09:56 – 10:36
- 4☿︎ Mercury10:36 – 11:16
- 5☽︎ Moon11:16 – 11:56
- 6♄︎ Saturn11:56 – 12:36
- 7♃︎ Jupiter12:36 – 13:16
- 8♂︎ Mars13:16 – 13:55
- 9☉︎ Sun13:55 – 14:35
- 10♀︎ Venus14:35 – 15:15
- 11☿︎ Mercury15:15 – 15:55
- 12☽︎ Moon15:55 – 16:35
Night
- 1♄︎ Saturn16:35 – 17:55
- 2♃︎ Jupiter17:55 – 19:15
- 3♂︎ Mars19:15 – 20:35
- 4☉︎ Sun20:35 – 21:56
- 5♀︎ Venus21:56 – 23:16
- 6☿︎ Mercury23:16 – 00:36
- 7☽︎ Moon00:36 – 01:56
- 8♄︎ Saturn01:56 – 03:17
- 9♃︎ Jupiter03:17 – 04:37
- 10♂︎ Mars04:37 – 05:57
- 11☉︎ Sun05:57 – 07:17
- 12♀︎ Venus07:17 – 08:37
Other cities · Belgium
Questions
How are the planetary hours calculated in Leuven?
On Tuesday, 15 December 2026, the Sun rises at 08:37 and sets at 16:35: the day lasts 7h 58m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:37, lasts 16h 03m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
Mars, from 08:37 to 09:17: 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.