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 Wednesday, 12 August 2026: day of Mercury
- Sunrise
- 06:23
- Sunset
- 21:07
- Next sunrise
- 06:25
A day hour lasts 1h 14m; a night hour, 46 min. Local time (Europe/Brussels).
Day
- 1☿︎ Mercury06:23 – 07:37
- 2☽︎ Moon07:37 – 08:51
- 3♄︎ Saturn08:51 – 10:04
- 4♃︎ Jupiter10:04 – 11:18
- 5♂︎ Mars11:18 – 12:32
- 6☉︎ Sun12:32 – 13:45
- 7♀︎ Venus13:45 – 14:59
- 8☿︎ Mercury14:59 – 16:13
- 9☽︎ Moon16:13 – 17:26
- 10♄︎ Saturn17:26 – 18:40
- 11♃︎ Jupiter18:40 – 19:54
- 12♂︎ Mars19:54 – 21:07
Night
- 1☉︎ Sun21:07 – 21:54
- 2♀︎ Venus21:54 – 22:40
- 3☿︎ Mercury22:40 – 23:27
- 4☽︎ Moon23:27 – 00:13
- 5♄︎ Saturn00:13 – 01:00
- 6♃︎ Jupiter01:00 – 01:46
- 7♂︎ Mars01:46 – 02:32
- 8☉︎ Sun02:32 – 03:19
- 9♀︎ Venus03:19 – 04:05
- 10☿︎ Mercury04:05 – 04:52
- 11☽︎ Moon04:52 – 05:38
- 12♄︎ Saturn05:38 – 06:25
Other cities · Belgium
Questions
How are the planetary hours calculated in Leuven?
On Wednesday, 12 August 2026, the Sun rises at 06:23 and sets at 21:07: the day lasts 14h 44m, that is twelve day hours of 1h 14m. The night, until the next sunrise at 06:25, lasts 9h 18m: twelve night hours of 46 min.
Which planet rules the first hour that day?
Mercury, from 06:23 to 07:37: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.