Planetary hours
in Brest.
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 Saturday, 20 December 2025: day of Saturn
- Sunrise
- 09:06
- Sunset
- 17:25
- Next sunrise
- 09:06
A day hour lasts 42 min; a night hour, 1h 18m. Local time (Europe/Paris).
Day
- 1♄︎ Saturn09:06 – 09:47
- 2♃︎ Jupiter09:47 – 10:29
- 3♂︎ Mars10:29 – 11:10
- 4☉︎ Sun11:10 – 11:52
- 5♀︎ Venus11:52 – 12:34
- 6☿︎ Mercury12:34 – 13:15
- 7☽︎ Moon13:15 – 13:57
- 8♄︎ Saturn13:57 – 14:38
- 9♃︎ Jupiter14:38 – 15:20
- 10♂︎ Mars15:20 – 16:01
- 11☉︎ Sun16:01 – 16:43
- 12♀︎ Venus16:43 – 17:25
Night
- 1☿︎ Mercury17:25 – 18:43
- 2☽︎ Moon18:43 – 20:02
- 3♄︎ Saturn20:02 – 21:20
- 4♃︎ Jupiter21:20 – 22:38
- 5♂︎ Mars22:38 – 23:57
- 6☉︎ Sun23:57 – 01:15
- 7♀︎ Venus01:15 – 02:34
- 8☿︎ Mercury02:34 – 03:52
- 9☽︎ Moon03:52 – 05:11
- 10♄︎ Saturn05:11 – 06:29
- 11♃︎ Jupiter06:29 – 07:48
- 12♂︎ Mars07:48 – 09:06
Other cities · France
Questions
How are the planetary hours calculated in Brest?
On Saturday, 20 December 2025, the Sun rises at 09:06 and sets at 17:25: the day lasts 8h 19m, that is twelve day hours of 42 min. The night, until the next sunrise at 09:06, lasts 15h 42m: twelve night hours of 1h 18m.
Which planet rules the first hour that day?
Saturn, from 09:06 to 09:47: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.