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 September 2025: day of Mercury
- Sunrise
- 07:55
- Sunset
- 19:59
- Next sunrise
- 07:57
A day hour lasts 1h 00m; a night hour, 1h 00m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury07:55 – 08:56
- 2☽︎ Moon08:56 – 09:56
- 3♄︎ Saturn09:56 – 10:56
- 4♃︎ Jupiter10:56 – 11:57
- 5♂︎ Mars11:57 – 12:57
- 6☉︎ Sun12:57 – 13:57
- 7♀︎ Venus13:57 – 14:58
- 8☿︎ Mercury14:58 – 15:58
- 9☽︎ Moon15:58 – 16:58
- 10♄︎ Saturn16:58 – 17:58
- 11♃︎ Jupiter17:58 – 18:59
- 12♂︎ Mars18:59 – 19:59
Night
- 1☉︎ Sun19:59 – 20:59
- 2♀︎ Venus20:59 – 21:59
- 3☿︎ Mercury21:59 – 22:58
- 4☽︎ Moon22:58 – 23:58
- 5♄︎ Saturn23:58 – 00:58
- 6♃︎ Jupiter00:58 – 01:58
- 7♂︎ Mars01:58 – 02:58
- 8☉︎ Sun02:58 – 03:57
- 9♀︎ Venus03:57 – 04:57
- 10☿︎ Mercury04:57 – 05:57
- 11☽︎ Moon05:57 – 06:57
- 12♄︎ Saturn06:57 – 07:57
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Wednesday, 24 September 2025, the Sun rises at 07:55 and sets at 19:59: the day lasts 12h 04m, that is twelve day hours of 1h 00m. The night, until the next sunrise at 07:57, lasts 11h 58m: twelve night hours of 1h 00m.
Which planet rules the first hour that day?
Mercury, from 07:55 to 08:56: 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.