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 Tuesday, 23 September 2025: day of Mars
- Sunrise
- 08:06
- Sunset
- 20:13
- Next sunrise
- 08:07
A day hour lasts 1h 01m; a night hour, 1h 00m. Local time (Europe/Paris).
Day
- 1♂︎ Mars08:06 – 09:06
- 2☉︎ Sun09:06 – 10:07
- 3♀︎ Venus10:07 – 11:07
- 4☿︎ Mercury11:07 – 12:08
- 5☽︎ Moon12:08 – 13:09
- 6♄︎ Saturn13:09 – 14:09
- 7♃︎ Jupiter14:09 – 15:10
- 8♂︎ Mars15:10 – 16:10
- 9☉︎ Sun16:10 – 17:11
- 10♀︎ Venus17:11 – 18:12
- 11☿︎ Mercury18:12 – 19:12
- 12☽︎ Moon19:12 – 20:13
Night
- 1♄︎ Saturn20:13 – 21:12
- 2♃︎ Jupiter21:12 – 22:12
- 3♂︎ Mars22:12 – 23:11
- 4☉︎ Sun23:11 – 00:11
- 5♀︎ Venus00:11 – 01:10
- 6☿︎ Mercury01:10 – 02:10
- 7☽︎ Moon02:10 – 03:09
- 8♄︎ Saturn03:09 – 04:09
- 9♃︎ Jupiter04:09 – 05:09
- 10♂︎ Mars05:09 – 06:08
- 11☉︎ Sun06:08 – 07:08
- 12♀︎ Venus07:08 – 08:07
Other cities · France
Questions
How are the planetary hours calculated in Brest?
On Tuesday, 23 September 2025, the Sun rises at 08:06 and sets at 20:13: the day lasts 12h 07m, that is twelve day hours of 1h 01m. The night, until the next sunrise at 08:07, lasts 11h 54m: twelve night hours of 1h 00m.
Which planet rules the first hour that day?
Mars, from 08:06 to 09:06: 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.