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, 13 December 2025: day of Saturn
- Sunrise
- 09:01
- Sunset
- 17:23
- Next sunrise
- 09:02
A day hour lasts 42 min; a night hour, 1h 18m. Local time (Europe/Paris).
Day
- 1♄︎ Saturn09:01 – 09:43
- 2♃︎ Jupiter09:43 – 10:24
- 3♂︎ Mars10:24 – 11:06
- 4☉︎ Sun11:06 – 11:48
- 5♀︎ Venus11:48 – 12:30
- 6☿︎ Mercury12:30 – 13:12
- 7☽︎ Moon13:12 – 13:54
- 8♄︎ Saturn13:54 – 14:35
- 9♃︎ Jupiter14:35 – 15:17
- 10♂︎ Mars15:17 – 15:59
- 11☉︎ Sun15:59 – 16:41
- 12♀︎ Venus16:41 – 17:23
Night
- 1☿︎ Mercury17:23 – 18:41
- 2☽︎ Moon18:41 – 19:59
- 3♄︎ Saturn19:59 – 21:17
- 4♃︎ Jupiter21:17 – 22:36
- 5♂︎ Mars22:36 – 23:54
- 6☉︎ Sun23:54 – 01:12
- 7♀︎ Venus01:12 – 02:30
- 8☿︎ Mercury02:30 – 03:49
- 9☽︎ Moon03:49 – 05:07
- 10♄︎ Saturn05:07 – 06:25
- 11♃︎ Jupiter06:25 – 07:43
- 12♂︎ Mars07:43 – 09:02
Other cities · France
Questions
How are the planetary hours calculated in Brest?
On Saturday, 13 December 2025, the Sun rises at 09:01 and sets at 17:23: the day lasts 8h 22m, that is twelve day hours of 42 min. The night, until the next sunrise at 09:02, lasts 15h 39m: twelve night hours of 1h 18m.
Which planet rules the first hour that day?
Saturn, from 09:01 to 09:43: 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.