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, 20 January 2026: day of Mars
- Sunrise
- 08:32
- Sunset
- 17:12
- Next sunrise
- 08:31
A day hour lasts 43 min; a night hour, 1h 17m. Local time (Europe/Brussels).
Day
- 1♂︎ Mars08:32 – 09:16
- 2☉︎ Sun09:16 – 09:59
- 3♀︎ Venus09:59 – 10:42
- 4☿︎ Mercury10:42 – 11:25
- 5☽︎ Moon11:25 – 12:09
- 6♄︎ Saturn12:09 – 12:52
- 7♃︎ Jupiter12:52 – 13:35
- 8♂︎ Mars13:35 – 14:18
- 9☉︎ Sun14:18 – 15:02
- 10♀︎ Venus15:02 – 15:45
- 11☿︎ Mercury15:45 – 16:28
- 12☽︎ Moon16:28 – 17:12
Night
- 1♄︎ Saturn17:12 – 18:28
- 2♃︎ Jupiter18:28 – 19:45
- 3♂︎ Mars19:45 – 21:01
- 4☉︎ Sun21:01 – 22:18
- 5♀︎ Venus22:18 – 23:35
- 6☿︎ Mercury23:35 – 00:51
- 7☽︎ Moon00:51 – 02:08
- 8♄︎ Saturn02:08 – 03:25
- 9♃︎ Jupiter03:25 – 04:41
- 10♂︎ Mars04:41 – 05:58
- 11☉︎ Sun05:58 – 07:15
- 12♀︎ Venus07:15 – 08:31
Other cities · Belgium
Questions
How are the planetary hours calculated in Leuven?
On Tuesday, 20 January 2026, the Sun rises at 08:32 and sets at 17:12: the day lasts 8h 39m, that is twelve day hours of 43 min. The night, until the next sunrise at 08:31, lasts 15h 20m: twelve night hours of 1h 17m.
Which planet rules the first hour that day?
Mars, from 08:32 to 09:16: 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.