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, 17 September 2025: day of Mercury
- Sunrise
- 07:46
- Sunset
- 20:13
- Next sunrise
- 07:47
A day hour lasts 1h 02m; a night hour, 58 min. Local time (Europe/Paris).
Day
- 1☿︎ Mercury07:46 – 08:48
- 2☽︎ Moon08:48 – 09:51
- 3♄︎ Saturn09:51 – 10:53
- 4♃︎ Jupiter10:53 – 11:55
- 5♂︎ Mars11:55 – 12:57
- 6☉︎ Sun12:57 – 14:00
- 7♀︎ Venus14:00 – 15:02
- 8☿︎ Mercury15:02 – 16:04
- 9☽︎ Moon16:04 – 17:06
- 10♄︎ Saturn17:06 – 18:09
- 11♃︎ Jupiter18:09 – 19:11
- 12♂︎ Mars19:11 – 20:13
Night
- 1☉︎ Sun20:13 – 21:11
- 2♀︎ Venus21:11 – 22:09
- 3☿︎ Mercury22:09 – 23:07
- 4☽︎ Moon23:07 – 00:05
- 5♄︎ Saturn00:05 – 01:02
- 6♃︎ Jupiter01:02 – 02:00
- 7♂︎ Mars02:00 – 02:58
- 8☉︎ Sun02:58 – 03:56
- 9♀︎ Venus03:56 – 04:54
- 10☿︎ Mercury04:54 – 05:52
- 11☽︎ Moon05:52 – 06:49
- 12♄︎ Saturn06:49 – 07:47
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Wednesday, 17 September 2025, the Sun rises at 07:46 and sets at 20:13: the day lasts 12h 27m, that is twelve day hours of 1h 02m. The night, until the next sunrise at 07:47, lasts 11h 34m: twelve night hours of 58 min.
Which planet rules the first hour that day?
Mercury, from 07:46 to 08:48: 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.