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 Thursday, 18 September 2025: day of Jupiter
- Sunrise
- 07:47
- Sunset
- 20:11
- Next sunrise
- 07:49
A day hour lasts 1h 02m; a night hour, 58 min. Local time (Europe/Paris).
Day
- 1♃︎ Jupiter07:47 – 08:49
- 2♂︎ Mars08:49 – 09:51
- 3☉︎ Sun09:51 – 10:53
- 4♀︎ Venus10:53 – 11:55
- 5☿︎ Mercury11:55 – 12:57
- 6☽︎ Moon12:57 – 13:59
- 7♄︎ Saturn13:59 – 15:01
- 8♃︎ Jupiter15:01 – 16:03
- 9♂︎ Mars16:03 – 17:05
- 10☉︎ Sun17:05 – 18:07
- 11♀︎ Venus18:07 – 19:09
- 12☿︎ Mercury19:09 – 20:11
Night
- 1☽︎ Moon20:11 – 21:09
- 2♄︎ Saturn21:09 – 22:08
- 3♃︎ Jupiter22:08 – 23:06
- 4♂︎ Mars23:06 – 00:04
- 5☉︎ Sun00:04 – 01:02
- 6♀︎ Venus01:02 – 02:00
- 7☿︎ Mercury02:00 – 02:58
- 8☽︎ Moon02:58 – 03:56
- 9♄︎ Saturn03:56 – 04:54
- 10♃︎ Jupiter04:54 – 05:52
- 11♂︎ Mars05:52 – 06:51
- 12☉︎ Sun06:51 – 07:49
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Thursday, 18 September 2025, the Sun rises at 07:47 and sets at 20:11: the day lasts 12h 24m, that is twelve day hours of 1h 02m. The night, until the next sunrise at 07:49, lasts 11h 37m: twelve night hours of 58 min.
Which planet rules the first hour that day?
Jupiter, from 07:47 to 08:49: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.