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 Tuesday, 9 September 2025: day of Mars
- Sunrise
- 07:35
- Sunset
- 20:30
- Next sunrise
- 07:37
A day hour lasts 1h 05m; a night hour, 56 min. Local time (Europe/Paris).
Day
- 1♂︎ Mars07:35 – 08:40
- 2☉︎ Sun08:40 – 09:44
- 3♀︎ Venus09:44 – 10:49
- 4☿︎ Mercury10:49 – 11:53
- 5☽︎ Moon11:53 – 12:58
- 6♄︎ Saturn12:58 – 14:02
- 7♃︎ Jupiter14:02 – 15:07
- 8♂︎ Mars15:07 – 16:11
- 9☉︎ Sun16:11 – 17:16
- 10♀︎ Venus17:16 – 18:21
- 11☿︎ Mercury18:21 – 19:25
- 12☽︎ Moon19:25 – 20:30
Night
- 1♄︎ Saturn20:30 – 21:25
- 2♃︎ Jupiter21:25 – 22:21
- 3♂︎ Mars22:21 – 23:16
- 4☉︎ Sun23:16 – 00:12
- 5♀︎ Venus00:12 – 01:08
- 6☿︎ Mercury01:08 – 02:03
- 7☽︎ Moon02:03 – 02:59
- 8♄︎ Saturn02:59 – 03:54
- 9♃︎ Jupiter03:54 – 04:50
- 10♂︎ Mars04:50 – 05:46
- 11☉︎ Sun05:46 – 06:41
- 12♀︎ Venus06:41 – 07:37
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Tuesday, 9 September 2025, the Sun rises at 07:35 and sets at 20:30: the day lasts 12h 54m, that is twelve day hours of 1h 05m. The night, until the next sunrise at 07:37, lasts 11h 07m: twelve night hours of 56 min.
Which planet rules the first hour that day?
Mars, from 07:35 to 08:40: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.