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 Saturday, 6 September 2025: day of Saturn
- Sunrise
- 07:05
- Sunset
- 20:04
- Next sunrise
- 07:06
A day hour lasts 1h 05m; a night hour, 55 min. Local time (Europe/Paris).
Day
- 1♄︎ Saturn07:05 – 08:10
- 2♃︎ Jupiter08:10 – 09:15
- 3♂︎ Mars09:15 – 10:20
- 4☉︎ Sun10:20 – 11:25
- 5♀︎ Venus11:25 – 12:30
- 6☿︎ Mercury12:30 – 13:35
- 7☽︎ Moon13:35 – 14:40
- 8♄︎ Saturn14:40 – 15:45
- 9♃︎ Jupiter15:45 – 16:50
- 10♂︎ Mars16:50 – 17:55
- 11☉︎ Sun17:55 – 18:59
- 12♀︎ Venus18:59 – 20:04
Night
- 1☿︎ Mercury20:04 – 21:00
- 2☽︎ Moon21:00 – 21:55
- 3♄︎ Saturn21:55 – 22:50
- 4♃︎ Jupiter22:50 – 23:45
- 5♂︎ Mars23:45 – 00:40
- 6☉︎ Sun00:40 – 01:35
- 7♀︎ Venus01:35 – 02:30
- 8☿︎ Mercury02:30 – 03:25
- 9☽︎ Moon03:25 – 04:20
- 10♄︎ Saturn04:20 – 05:16
- 11♃︎ Jupiter05:16 – 06:11
- 12♂︎ Mars06:11 – 07:06
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Saturday, 6 September 2025, the Sun rises at 07:05 and sets at 20:04: the day lasts 13h 00m, that is twelve day hours of 1h 05m. The night, until the next sunrise at 07:06, lasts 11h 01m: twelve night hours of 55 min.
Which planet rules the first hour that day?
Saturn, from 07:05 to 08:10: 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.