Planetary hours
in Nantes.
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, 18 October 2025: day of Saturn
- Sunrise
- 08:28
- Sunset
- 19:12
- Next sunrise
- 08:30
A day hour lasts 54 min; a night hour, 1h 06m. Local time (Europe/Paris).
Day
- 1♄︎ Saturn08:28 – 09:22
- 2♃︎ Jupiter09:22 – 10:16
- 3♂︎ Mars10:16 – 11:09
- 4☉︎ Sun11:09 – 12:03
- 5♀︎ Venus12:03 – 12:57
- 6☿︎ Mercury12:57 – 13:50
- 7☽︎ Moon13:50 – 14:44
- 8♄︎ Saturn14:44 – 15:38
- 9♃︎ Jupiter15:38 – 16:31
- 10♂︎ Mars16:31 – 17:25
- 11☉︎ Sun17:25 – 18:19
- 12♀︎ Venus18:19 – 19:12
Night
- 1☿︎ Mercury19:12 – 20:19
- 2☽︎ Moon20:19 – 21:25
- 3♄︎ Saturn21:25 – 22:32
- 4♃︎ Jupiter22:32 – 23:38
- 5♂︎ Mars23:38 – 00:45
- 6☉︎ Sun00:45 – 01:51
- 7♀︎ Venus01:51 – 02:58
- 8☿︎ Mercury02:58 – 04:04
- 9☽︎ Moon04:04 – 05:11
- 10♄︎ Saturn05:11 – 06:17
- 11♃︎ Jupiter06:17 – 07:23
- 12♂︎ Mars07:23 – 08:30
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Saturday, 18 October 2025, the Sun rises at 08:28 and sets at 19:12: the day lasts 10h 44m, that is twelve day hours of 54 min. The night, until the next sunrise at 08:30, lasts 13h 18m: twelve night hours of 1h 06m.
Which planet rules the first hour that day?
Saturn, from 08:28 to 09:22: 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.