Planetary hours
in Strasbourg.
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, 20 December 2025: day of Saturn
- Sunrise
- 08:18
- Sunset
- 16:35
- Next sunrise
- 08:18
A day hour lasts 41 min; a night hour, 1h 19m. Local time (Europe/Paris).
Day
- 1♄︎ Saturn08:18 – 08:59
- 2♃︎ Jupiter08:59 – 09:40
- 3♂︎ Mars09:40 – 10:22
- 4☉︎ Sun10:22 – 11:03
- 5♀︎ Venus11:03 – 11:45
- 6☿︎ Mercury11:45 – 12:26
- 7☽︎ Moon12:26 – 13:08
- 8♄︎ Saturn13:08 – 13:49
- 9♃︎ Jupiter13:49 – 14:30
- 10♂︎ Mars14:30 – 15:12
- 11☉︎ Sun15:12 – 15:53
- 12♀︎ Venus15:53 – 16:35
Night
- 1☿︎ Mercury16:35 – 17:53
- 2☽︎ Moon17:53 – 19:12
- 3♄︎ Saturn19:12 – 20:31
- 4♃︎ Jupiter20:31 – 21:49
- 5♂︎ Mars21:49 – 23:08
- 6☉︎ Sun23:08 – 00:26
- 7♀︎ Venus00:26 – 01:45
- 8☿︎ Mercury01:45 – 03:04
- 9☽︎ Moon03:04 – 04:22
- 10♄︎ Saturn04:22 – 05:41
- 11♃︎ Jupiter05:41 – 06:59
- 12♂︎ Mars06:59 – 08:18
Other cities · France
Questions
How are the planetary hours calculated in Strasbourg?
On Saturday, 20 December 2025, the Sun rises at 08:18 and sets at 16:35: the day lasts 8h 17m, that is twelve day hours of 41 min. The night, until the next sunrise at 08:18, lasts 15h 43m: twelve night hours of 1h 19m.
Which planet rules the first hour that day?
Saturn, from 08:18 to 08:59: 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.