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 Wednesday, 24 December 2025: day of Mercury
- Sunrise
- 08:51
- Sunset
- 17:20
- Next sunrise
- 08:51
A day hour lasts 42 min; a night hour, 1h 18m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury08:51 – 09:33
- 2☽︎ Moon09:33 – 10:16
- 3♄︎ Saturn10:16 – 10:58
- 4♃︎ Jupiter10:58 – 11:41
- 5♂︎ Mars11:41 – 12:23
- 6☉︎ Sun12:23 – 13:05
- 7♀︎ Venus13:05 – 13:48
- 8☿︎ Mercury13:48 – 14:30
- 9☽︎ Moon14:30 – 15:13
- 10♄︎ Saturn15:13 – 15:55
- 11♃︎ Jupiter15:55 – 16:38
- 12♂︎ Mars16:38 – 17:20
Night
- 1☉︎ Sun17:20 – 18:38
- 2♀︎ Venus18:38 – 19:55
- 3☿︎ Mercury19:55 – 21:13
- 4☽︎ Moon21:13 – 22:30
- 5♄︎ Saturn22:30 – 23:48
- 6♃︎ Jupiter23:48 – 01:06
- 7♂︎ Mars01:06 – 02:23
- 8☉︎ Sun02:23 – 03:41
- 9♀︎ Venus03:41 – 04:58
- 10☿︎ Mercury04:58 – 06:16
- 11☽︎ Moon06:16 – 07:34
- 12♄︎ Saturn07:34 – 08:51
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Wednesday, 24 December 2025, the Sun rises at 08:51 and sets at 17:20: the day lasts 8h 29m, that is twelve day hours of 42 min. The night, until the next sunrise at 08:51, lasts 15h 31m: twelve night hours of 1h 18m.
Which planet rules the first hour that day?
Mercury, from 08:51 to 09:33: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.