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 Wednesday, 24 December 2025: day of Mercury
- Sunrise
- 09:08
- Sunset
- 17:27
- Next sunrise
- 09:08
A day hour lasts 42 min; a night hour, 1h 18m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury09:08 – 09:49
- 2☽︎ Moon09:49 – 10:31
- 3♄︎ Saturn10:31 – 11:12
- 4♃︎ Jupiter11:12 – 11:54
- 5♂︎ Mars11:54 – 12:36
- 6☉︎ Sun12:36 – 13:17
- 7♀︎ Venus13:17 – 13:59
- 8☿︎ Mercury13:59 – 14:40
- 9☽︎ Moon14:40 – 15:22
- 10♄︎ Saturn15:22 – 16:04
- 11♃︎ Jupiter16:04 – 16:45
- 12♂︎ Mars16:45 – 17:27
Night
- 1☉︎ Sun17:27 – 18:45
- 2♀︎ Venus18:45 – 20:04
- 3☿︎ Mercury20:04 – 21:22
- 4☽︎ Moon21:22 – 22:40
- 5♄︎ Saturn22:40 – 23:59
- 6♃︎ Jupiter23:59 – 01:17
- 7♂︎ Mars01:17 – 02:36
- 8☉︎ Sun02:36 – 03:54
- 9♀︎ Venus03:54 – 05:13
- 10☿︎ Mercury05:13 – 06:31
- 11☽︎ Moon06:31 – 07:49
- 12♄︎ Saturn07:49 – 09:08
Other cities · France
Questions
How are the planetary hours calculated in Brest?
On Wednesday, 24 December 2025, the Sun rises at 09:08 and sets at 17:27: the day lasts 8h 19m, that is twelve day hours of 42 min. The night, until the next sunrise at 09:08, lasts 15h 41m: twelve night hours of 1h 18m.
Which planet rules the first hour that day?
Mercury, from 09:08 to 09:49: 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.