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, 3 December 2025: day of Mercury
- Sunrise
- 08:34
- Sunset
- 17:17
- Next sunrise
- 08:35
A day hour lasts 44 min; a night hour, 1h 17m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury08:34 – 09:18
- 2☽︎ Moon09:18 – 10:01
- 3♄︎ Saturn10:01 – 10:45
- 4♃︎ Jupiter10:45 – 11:28
- 5♂︎ Mars11:28 – 12:12
- 6☉︎ Sun12:12 – 12:55
- 7♀︎ Venus12:55 – 13:39
- 8☿︎ Mercury13:39 – 14:23
- 9☽︎ Moon14:23 – 15:06
- 10♄︎ Saturn15:06 – 15:50
- 11♃︎ Jupiter15:50 – 16:33
- 12♂︎ Mars16:33 – 17:17
Night
- 1☉︎ Sun17:17 – 18:33
- 2♀︎ Venus18:33 – 19:50
- 3☿︎ Mercury19:50 – 21:06
- 4☽︎ Moon21:06 – 22:23
- 5♄︎ Saturn22:23 – 23:39
- 6♃︎ Jupiter23:39 – 00:56
- 7♂︎ Mars00:56 – 02:13
- 8☉︎ Sun02:13 – 03:29
- 9♀︎ Venus03:29 – 04:46
- 10☿︎ Mercury04:46 – 06:02
- 11☽︎ Moon06:02 – 07:19
- 12♄︎ Saturn07:19 – 08:35
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Wednesday, 3 December 2025, the Sun rises at 08:34 and sets at 17:17: the day lasts 8h 43m, that is twelve day hours of 44 min. The night, until the next sunrise at 08:35, lasts 15h 18m: twelve night hours of 1h 17m.
Which planet rules the first hour that day?
Mercury, from 08:34 to 09:18: 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.