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 Thursday, 23 October 2025: day of Jupiter
- Sunrise
- 08:17
- Sunset
- 18:32
- Next sunrise
- 08:19
A day hour lasts 51 min; a night hour, 1h 09m. Local time (Europe/Brussels).
Day
- 1♃︎ Jupiter08:17 – 09:09
- 2♂︎ Mars09:09 – 10:00
- 3☉︎ Sun10:00 – 10:51
- 4♀︎ Venus10:51 – 11:42
- 5☿︎ Mercury11:42 – 12:33
- 6☽︎ Moon12:33 – 13:25
- 7♄︎ Saturn13:25 – 14:16
- 8♃︎ Jupiter14:16 – 15:07
- 9♂︎ Mars15:07 – 15:58
- 10☉︎ Sun15:58 – 16:49
- 11♀︎ Venus16:49 – 17:41
- 12☿︎ Mercury17:41 – 18:32
Night
- 1☽︎ Moon18:32 – 19:41
- 2♄︎ Saturn19:41 – 20:50
- 3♃︎ Jupiter20:50 – 21:59
- 4♂︎ Mars21:59 – 23:08
- 5☉︎ Sun23:08 – 00:16
- 6♀︎ Venus00:16 – 01:25
- 7☿︎ Mercury01:25 – 02:34
- 8☽︎ Moon02:34 – 03:43
- 9♄︎ Saturn03:43 – 04:52
- 10♃︎ Jupiter04:52 – 06:01
- 11♂︎ Mars06:01 – 07:10
- 12☉︎ Sun07:10 – 08:19
Other cities · Belgium
Questions
How are the planetary hours calculated in Leuven?
On Thursday, 23 October 2025, the Sun rises at 08:17 and sets at 18:32: the day lasts 10h 14m, that is twelve day hours of 51 min. The night, until the next sunrise at 08:19, lasts 13h 47m: twelve night hours of 1h 09m.
Which planet rules the first hour that day?
Jupiter, from 08:17 to 09:09: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.