Planetary hours
in Mons.
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 Saturday, 13 December 2025: day of Saturn
- Sunrise
- 08:36
- Sunset
- 16:40
- Next sunrise
- 08:37
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/Brussels).
Day
- 1♄︎ Saturn08:36 – 09:16
- 2♃︎ Jupiter09:16 – 09:57
- 3♂︎ Mars09:57 – 10:37
- 4☉︎ Sun10:37 – 11:17
- 5♀︎ Venus11:17 – 11:58
- 6☿︎ Mercury11:58 – 12:38
- 7☽︎ Moon12:38 – 13:18
- 8♄︎ Saturn13:18 – 13:58
- 9♃︎ Jupiter13:58 – 14:39
- 10♂︎ Mars14:39 – 15:19
- 11☉︎ Sun15:19 – 15:59
- 12♀︎ Venus15:59 – 16:40
Night
- 1☿︎ Mercury16:40 – 17:59
- 2☽︎ Moon17:59 – 19:19
- 3♄︎ Saturn19:19 – 20:39
- 4♃︎ Jupiter20:39 – 21:59
- 5♂︎ Mars21:59 – 23:19
- 6☉︎ Sun23:19 – 00:38
- 7♀︎ Venus00:38 – 01:58
- 8☿︎ Mercury01:58 – 03:18
- 9☽︎ Moon03:18 – 04:38
- 10♄︎ Saturn04:38 – 05:57
- 11♃︎ Jupiter05:57 – 07:17
- 12♂︎ Mars07:17 – 08:37
Other cities · Belgium
Questions
How are the planetary hours calculated in Mons?
On Saturday, 13 December 2025, the Sun rises at 08:36 and sets at 16:40: the day lasts 8h 04m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:37, lasts 15h 57m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
Saturn, from 08:36 to 09:16: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.