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 Sunday, 28 December 2025: day of the Sun
- Sunrise
- 08:52
- Sunset
- 17:23
- Next sunrise
- 08:52
A day hour lasts 43 min; a night hour, 1h 17m. Local time (Europe/Paris).
Day
- 1☉︎ Sun08:52 – 09:35
- 2♀︎ Venus09:35 – 10:17
- 3☿︎ Mercury10:17 – 11:00
- 4☽︎ Moon11:00 – 11:42
- 5♄︎ Saturn11:42 – 12:25
- 6♃︎ Jupiter12:25 – 13:07
- 7♂︎ Mars13:07 – 13:50
- 8☉︎ Sun13:50 – 14:33
- 9♀︎ Venus14:33 – 15:15
- 10☿︎ Mercury15:15 – 15:58
- 11☽︎ Moon15:58 – 16:40
- 12♄︎ Saturn16:40 – 17:23
Night
- 1♃︎ Jupiter17:23 – 18:40
- 2♂︎ Mars18:40 – 19:58
- 3☉︎ Sun19:58 – 21:15
- 4♀︎ Venus21:15 – 22:33
- 5☿︎ Mercury22:33 – 23:50
- 6☽︎ Moon23:50 – 01:07
- 7♄︎ Saturn01:07 – 02:25
- 8♃︎ Jupiter02:25 – 03:42
- 9♂︎ Mars03:42 – 05:00
- 10☉︎ Sun05:00 – 06:17
- 11♀︎ Venus06:17 – 07:35
- 12☿︎ Mercury07:35 – 08:52
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Sunday, 28 December 2025, the Sun rises at 08:52 and sets at 17:23: the day lasts 8h 31m, that is twelve day hours of 43 min. The night, until the next sunrise at 08:52, lasts 15h 29m: twelve night hours of 1h 17m.
Which planet rules the first hour that day?
The Sun, from 08:52 to 09:35: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.