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 Tuesday, 21 October 2025: day of Mars
- Sunrise
- 08:35
- Sunset
- 19:06
- Next sunrise
- 08:36
A day hour lasts 53 min; a night hour, 1h 08m. Local time (Europe/Paris).
Day
- 1♂︎ Mars08:35 – 09:27
- 2☉︎ Sun09:27 – 10:20
- 3♀︎ Venus10:20 – 11:13
- 4☿︎ Mercury11:13 – 12:05
- 5☽︎ Moon12:05 – 12:58
- 6♄︎ Saturn12:58 – 13:50
- 7♃︎ Jupiter13:50 – 14:43
- 8♂︎ Mars14:43 – 15:36
- 9☉︎ Sun15:36 – 16:28
- 10♀︎ Venus16:28 – 17:21
- 11☿︎ Mercury17:21 – 18:13
- 12☽︎ Moon18:13 – 19:06
Night
- 1♄︎ Saturn19:06 – 20:14
- 2♃︎ Jupiter20:14 – 21:21
- 3♂︎ Mars21:21 – 22:29
- 4☉︎ Sun22:29 – 23:36
- 5♀︎ Venus23:36 – 00:44
- 6☿︎ Mercury00:44 – 01:51
- 7☽︎ Moon01:51 – 02:59
- 8♄︎ Saturn02:59 – 04:06
- 9♃︎ Jupiter04:06 – 05:14
- 10♂︎ Mars05:14 – 06:21
- 11☉︎ Sun06:21 – 07:29
- 12♀︎ Venus07:29 – 08:36
Other cities · France
Questions
How are the planetary hours calculated in Rennes?
On Tuesday, 21 October 2025, the Sun rises at 08:35 and sets at 19:06: the day lasts 10h 31m, that is twelve day hours of 53 min. The night, until the next sunrise at 08:36, lasts 13h 30m: twelve night hours of 1h 08m.
Which planet rules the first hour that day?
Mars, from 08:35 to 09:27: 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.