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, 20 January 2026: day of Mars
- Sunrise
- 09:00
- Sunset
- 17:58
- Next sunrise
- 08:59
A day hour lasts 45 min; a night hour, 1h 15m. Local time (Europe/Paris).
Day
- 1♂︎ Mars09:00 – 09:45
- 2☉︎ Sun09:45 – 10:29
- 3♀︎ Venus10:29 – 11:14
- 4☿︎ Mercury11:14 – 11:59
- 5☽︎ Moon11:59 – 12:44
- 6♄︎ Saturn12:44 – 13:29
- 7♃︎ Jupiter13:29 – 14:14
- 8♂︎ Mars14:14 – 14:58
- 9☉︎ Sun14:58 – 15:43
- 10♀︎ Venus15:43 – 16:28
- 11☿︎ Mercury16:28 – 17:13
- 12☽︎ Moon17:13 – 17:58
Night
- 1♄︎ Saturn17:58 – 19:13
- 2♃︎ Jupiter19:13 – 20:28
- 3♂︎ Mars20:28 – 21:43
- 4☉︎ Sun21:43 – 22:58
- 5♀︎ Venus22:58 – 00:13
- 6☿︎ Mercury00:13 – 01:28
- 7☽︎ Moon01:28 – 02:43
- 8♄︎ Saturn02:43 – 03:58
- 9♃︎ Jupiter03:58 – 05:14
- 10♂︎ Mars05:14 – 06:29
- 11☉︎ Sun06:29 – 07:44
- 12♀︎ Venus07:44 – 08:59
Other cities · France
Questions
How are the planetary hours calculated in Brest?
On Tuesday, 20 January 2026, the Sun rises at 09:00 and sets at 17:58: the day lasts 8h 58m, that is twelve day hours of 45 min. The night, until the next sunrise at 08:59, lasts 15h 01m: twelve night hours of 1h 15m.
Which planet rules the first hour that day?
Mars, from 09:00 to 09:45: 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.