Planetary hours
in Rennes.
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 Monday, 15 December 2025: day of the Moon
- Sunrise
- 08:50
- Sunset
- 17:13
- Next sunrise
- 08:51
A day hour lasts 42 min; a night hour, 1h 18m. Local time (Europe/Paris).
Day
- 1☽︎ Moon08:50 – 09:32
- 2♄︎ Saturn09:32 – 10:14
- 3♃︎ Jupiter10:14 – 10:56
- 4♂︎ Mars10:56 – 11:38
- 5☉︎ Sun11:38 – 12:19
- 6♀︎ Venus12:19 – 13:01
- 7☿︎ Mercury13:01 – 13:43
- 8☽︎ Moon13:43 – 14:25
- 9♄︎ Saturn14:25 – 15:07
- 10♃︎ Jupiter15:07 – 15:49
- 11♂︎ Mars15:49 – 16:31
- 12☉︎ Sun16:31 – 17:13
Night
- 1♀︎ Venus17:13 – 18:31
- 2☿︎ Mercury18:31 – 19:49
- 3☽︎ Moon19:49 – 21:07
- 4♄︎ Saturn21:07 – 22:25
- 5♃︎ Jupiter22:25 – 23:44
- 6♂︎ Mars23:44 – 01:02
- 7☉︎ Sun01:02 – 02:20
- 8♀︎ Venus02:20 – 03:38
- 9☿︎ Mercury03:38 – 04:56
- 10☽︎ Moon04:56 – 06:14
- 11♄︎ Saturn06:14 – 07:32
- 12♃︎ Jupiter07:32 – 08:51
Other cities · France
Questions
How are the planetary hours calculated in Rennes?
On Monday, 15 December 2025, the Sun rises at 08:50 and sets at 17:13: the day lasts 8h 23m, that is twelve day hours of 42 min. The night, until the next sunrise at 08:51, lasts 15h 38m: twelve night hours of 1h 18m.
Which planet rules the first hour that day?
The Moon, from 08:50 to 09:32: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Saturn, Jupiter, Mars, the Sun, Venus, Mercury, then the Moon 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.