Planetary hours
in Grenoble.
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 Monday, 22 December 2025: day of the Moon
- Sunrise
- 08:13
- Sunset
- 16:58
- Next sunrise
- 08:13
A day hour lasts 44 min; a night hour, 1h 16m. Local time (Europe/Paris).
Day
- 1☽︎ Moon08:13 – 08:57
- 2♄︎ Saturn08:57 – 09:40
- 3♃︎ Jupiter09:40 – 10:24
- 4♂︎ Mars10:24 – 11:08
- 5☉︎ Sun11:08 – 11:52
- 6♀︎ Venus11:52 – 12:35
- 7☿︎ Mercury12:35 – 13:19
- 8☽︎ Moon13:19 – 14:03
- 9♄︎ Saturn14:03 – 14:47
- 10♃︎ Jupiter14:47 – 15:30
- 11♂︎ Mars15:30 – 16:14
- 12☉︎ Sun16:14 – 16:58
Night
- 1♀︎ Venus16:58 – 18:14
- 2☿︎ Mercury18:14 – 19:30
- 3☽︎ Moon19:30 – 20:47
- 4♄︎ Saturn20:47 – 22:03
- 5♃︎ Jupiter22:03 – 23:19
- 6♂︎ Mars23:19 – 00:36
- 7☉︎ Sun00:36 – 01:52
- 8♀︎ Venus01:52 – 03:08
- 9☿︎ Mercury03:08 – 04:25
- 10☽︎ Moon04:25 – 05:41
- 11♄︎ Saturn05:41 – 06:57
- 12♃︎ Jupiter06:57 – 08:13
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Monday, 22 December 2025, the Sun rises at 08:13 and sets at 16:58: the day lasts 8h 45m, that is twelve day hours of 44 min. The night, until the next sunrise at 08:13, lasts 15h 16m: twelve night hours of 1h 16m.
Which planet rules the first hour that day?
The Moon, from 08:13 to 08:57: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Saturn, Jupiter, Mars, the Sun, Venus, Mercury, then the Moon 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.