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, 19 August 2025: day of Mars
- Sunrise
- 06:34
- Sunset
- 20:53
- Next sunrise
- 06:36
A day hour lasts 1h 12m; a night hour, 49 min. Local time (Europe/Brussels).
Day
- 1♂︎ Mars06:34 – 07:46
- 2☉︎ Sun07:46 – 08:58
- 3♀︎ Venus08:58 – 10:09
- 4☿︎ Mercury10:09 – 11:21
- 5☽︎ Moon11:21 – 12:32
- 6♄︎ Saturn12:32 – 13:44
- 7♃︎ Jupiter13:44 – 14:55
- 8♂︎ Mars14:55 – 16:07
- 9☉︎ Sun16:07 – 17:18
- 10♀︎ Venus17:18 – 18:30
- 11☿︎ Mercury18:30 – 19:42
- 12☽︎ Moon19:42 – 20:53
Night
- 1♄︎ Saturn20:53 – 21:42
- 2♃︎ Jupiter21:42 – 22:30
- 3♂︎ Mars22:30 – 23:19
- 4☉︎ Sun23:19 – 00:07
- 5♀︎ Venus00:07 – 00:56
- 6☿︎ Mercury00:56 – 01:45
- 7☽︎ Moon01:45 – 02:33
- 8♄︎ Saturn02:33 – 03:22
- 9♃︎ Jupiter03:22 – 04:10
- 10♂︎ Mars04:10 – 04:59
- 11☉︎ Sun04:59 – 05:47
- 12♀︎ Venus05:47 – 06:36
Other cities · Belgium
Questions
How are the planetary hours calculated in Leuven?
On Tuesday, 19 August 2025, the Sun rises at 06:34 and sets at 20:53: the day lasts 14h 19m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 06:36, lasts 9h 43m: twelve night hours of 49 min.
Which planet rules the first hour that day?
Mars, from 06:34 to 07:46: 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.