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 Thursday, 17 December 2026: day of Jupiter
- Sunrise
- 08:51
- Sunset
- 17:13
- Next sunrise
- 08:52
A day hour lasts 42 min; a night hour, 1h 18m. Local time (Europe/Paris).
Day
- 1♃︎ Jupiter08:51 – 09:33
- 2♂︎ Mars09:33 – 10:15
- 3☉︎ Sun10:15 – 10:57
- 4♀︎ Venus10:57 – 11:39
- 5☿︎ Mercury11:39 – 12:20
- 6☽︎ Moon12:20 – 13:02
- 7♄︎ Saturn13:02 – 13:44
- 8♃︎ Jupiter13:44 – 14:26
- 9♂︎ Mars14:26 – 15:08
- 10☉︎ Sun15:08 – 15:50
- 11♀︎ Venus15:50 – 16:31
- 12☿︎ Mercury16:31 – 17:13
Night
- 1☽︎ Moon17:13 – 18:32
- 2♄︎ Saturn18:32 – 19:50
- 3♃︎ Jupiter19:50 – 21:08
- 4♂︎ Mars21:08 – 22:26
- 5☉︎ Sun22:26 – 23:44
- 6♀︎ Venus23:44 – 01:03
- 7☿︎ Mercury01:03 – 02:21
- 8☽︎ Moon02:21 – 03:39
- 9♄︎ Saturn03:39 – 04:57
- 10♃︎ Jupiter04:57 – 06:15
- 11♂︎ Mars06:15 – 07:34
- 12☉︎ Sun07:34 – 08:52
Other cities · France
Questions
How are the planetary hours calculated in Rennes?
On Thursday, 17 December 2026, the Sun rises at 08:51 and sets at 17:13: the day lasts 8h 22m, that is twelve day hours of 42 min. The night, until the next sunrise at 08:52, lasts 15h 38m: twelve night hours of 1h 18m.
Which planet rules the first hour that day?
Jupiter, from 08:51 to 09:33: 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.