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, 23 September 2025: day of Mars
- Sunrise
- 07:29
- Sunset
- 19:36
- Next sunrise
- 07:30
A day hour lasts 1h 01m; a night hour, 59 min. Local time (Europe/Brussels).
Day
- 1♂︎ Mars07:29 – 08:29
- 2☉︎ Sun08:29 – 09:30
- 3♀︎ Venus09:30 – 10:31
- 4☿︎ Mercury10:31 – 11:31
- 5☽︎ Moon11:31 – 12:32
- 6♄︎ Saturn12:32 – 13:32
- 7♃︎ Jupiter13:32 – 14:33
- 8♂︎ Mars14:33 – 15:34
- 9☉︎ Sun15:34 – 16:34
- 10♀︎ Venus16:34 – 17:35
- 11☿︎ Mercury17:35 – 18:36
- 12☽︎ Moon18:36 – 19:36
Night
- 1♄︎ Saturn19:36 – 20:36
- 2♃︎ Jupiter20:36 – 21:35
- 3♂︎ Mars21:35 – 22:35
- 4☉︎ Sun22:35 – 23:34
- 5♀︎ Venus23:34 – 00:34
- 6☿︎ Mercury00:34 – 01:33
- 7☽︎ Moon01:33 – 02:33
- 8♄︎ Saturn02:33 – 03:32
- 9♃︎ Jupiter03:32 – 04:32
- 10♂︎ Mars04:32 – 05:31
- 11☉︎ Sun05:31 – 06:31
- 12♀︎ Venus06:31 – 07:30
Other cities · Belgium
Questions
How are the planetary hours calculated in Leuven?
On Tuesday, 23 September 2025, the Sun rises at 07:29 and sets at 19:36: the day lasts 12h 08m, that is twelve day hours of 1h 01m. The night, until the next sunrise at 07:30, lasts 11h 54m: twelve night hours of 59 min.
Which planet rules the first hour that day?
Mars, from 07:29 to 08:29: 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.