Planetary hours
in Reims.
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, 13 December 2025: day of Saturn
- Sunrise
- 08:30
- Sunset
- 16:45
- Next sunrise
- 08:31
A day hour lasts 41 min; a night hour, 1h 19m. Local time (Europe/Paris).
Day
- 1♄︎ Saturn08:30 – 09:12
- 2♃︎ Jupiter09:12 – 09:53
- 3♂︎ Mars09:53 – 10:34
- 4☉︎ Sun10:34 – 11:15
- 5♀︎ Venus11:15 – 11:56
- 6☿︎ Mercury11:56 – 12:38
- 7☽︎ Moon12:38 – 13:19
- 8♄︎ Saturn13:19 – 14:00
- 9♃︎ Jupiter14:00 – 14:41
- 10♂︎ Mars14:41 – 15:22
- 11☉︎ Sun15:22 – 16:04
- 12♀︎ Venus16:04 – 16:45
Night
- 1☿︎ Mercury16:45 – 18:04
- 2☽︎ Moon18:04 – 19:23
- 3♄︎ Saturn19:23 – 20:41
- 4♃︎ Jupiter20:41 – 22:00
- 5♂︎ Mars22:00 – 23:19
- 6☉︎ Sun23:19 – 00:38
- 7♀︎ Venus00:38 – 01:57
- 8☿︎ Mercury01:57 – 03:16
- 9☽︎ Moon03:16 – 04:35
- 10♄︎ Saturn04:35 – 05:54
- 11♃︎ Jupiter05:54 – 07:12
- 12♂︎ Mars07:12 – 08:31
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Questions
How are the planetary hours calculated in Reims?
On Saturday, 13 December 2025, the Sun rises at 08:30 and sets at 16:45: the day lasts 8h 14m, that is twelve day hours of 41 min. The night, until the next sunrise at 08:31, lasts 15h 46m: twelve night hours of 1h 19m.
Which planet rules the first hour that day?
Saturn, from 08:30 to 09:12: 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.