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 Wednesday, 24 December 2025: day of Mercury
- Sunrise
- 08:55
- Sunset
- 17:17
- Next sunrise
- 08:55
A day hour lasts 42 min; a night hour, 1h 18m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury08:55 – 09:37
- 2☽︎ Moon09:37 – 10:19
- 3♄︎ Saturn10:19 – 11:00
- 4♃︎ Jupiter11:00 – 11:42
- 5♂︎ Mars11:42 – 12:24
- 6☉︎ Sun12:24 – 13:06
- 7♀︎ Venus13:06 – 13:48
- 8☿︎ Mercury13:48 – 14:29
- 9☽︎ Moon14:29 – 15:11
- 10♄︎ Saturn15:11 – 15:53
- 11♃︎ Jupiter15:53 – 16:35
- 12♂︎ Mars16:35 – 17:17
Night
- 1☉︎ Sun17:17 – 18:35
- 2♀︎ Venus18:35 – 19:53
- 3☿︎ Mercury19:53 – 21:11
- 4☽︎ Moon21:11 – 22:30
- 5♄︎ Saturn22:30 – 23:48
- 6♃︎ Jupiter23:48 – 01:06
- 7♂︎ Mars01:06 – 02:24
- 8☉︎ Sun02:24 – 03:42
- 9♀︎ Venus03:42 – 05:01
- 10☿︎ Mercury05:01 – 06:19
- 11☽︎ Moon06:19 – 07:37
- 12♄︎ Saturn07:37 – 08:55
Other cities · France
Questions
How are the planetary hours calculated in Rennes?
On Wednesday, 24 December 2025, the Sun rises at 08:55 and sets at 17:17: the day lasts 8h 22m, that is twelve day hours of 42 min. The night, until the next sunrise at 08:55, lasts 15h 39m: twelve night hours of 1h 18m.
Which planet rules the first hour that day?
Mercury, from 08:55 to 09:37: 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.