Planetary hours
in Le Mans.
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 Thursday, 17 December 2026: day of Jupiter
- Sunrise
- 08:43
- Sunset
- 17:06
- Next sunrise
- 08:44
A day hour lasts 42 min; a night hour, 1h 18m. Local time (Europe/Paris).
Day
- 1♃︎ Jupiter08:43 – 09:25
- 2♂︎ Mars09:25 – 10:07
- 3☉︎ Sun10:07 – 10:49
- 4♀︎ Venus10:49 – 11:31
- 5☿︎ Mercury11:31 – 12:13
- 6☽︎ Moon12:13 – 12:55
- 7♄︎ Saturn12:55 – 13:37
- 8♃︎ Jupiter13:37 – 14:19
- 9♂︎ Mars14:19 – 15:01
- 10☉︎ Sun15:01 – 15:42
- 11♀︎ Venus15:42 – 16:24
- 12☿︎ Mercury16:24 – 17:06
Night
- 1☽︎ Moon17:06 – 18:24
- 2♄︎ Saturn18:24 – 19:43
- 3♃︎ Jupiter19:43 – 21:01
- 4♂︎ Mars21:01 – 22:19
- 5☉︎ Sun22:19 – 23:37
- 6♀︎ Venus23:37 – 00:55
- 7☿︎ Mercury00:55 – 02:13
- 8☽︎ Moon02:13 – 03:31
- 9♄︎ Saturn03:31 – 04:49
- 10♃︎ Jupiter04:49 – 06:08
- 11♂︎ Mars06:08 – 07:26
- 12☉︎ Sun07:26 – 08:44
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Questions
How are the planetary hours calculated in Le Mans?
On Thursday, 17 December 2026, the Sun rises at 08:43 and sets at 17:06: the day lasts 8h 23m, that is twelve day hours of 42 min. The night, until the next sunrise at 08:44, lasts 15h 38m: twelve night hours of 1h 18m.
Which planet rules the first hour that day?
Jupiter, from 08:43 to 09:25: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.