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, 31 December 2025: day of Mercury
- Sunrise
- 08:52
- Sunset
- 17:25
- Next sunrise
- 08:52
A day hour lasts 43 min; a night hour, 1h 17m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury08:52 – 09:35
- 2☽︎ Moon09:35 – 10:18
- 3♄︎ Saturn10:18 – 11:01
- 4♃︎ Jupiter11:01 – 11:43
- 5♂︎ Mars11:43 – 12:26
- 6☉︎ Sun12:26 – 13:09
- 7♀︎ Venus13:09 – 13:52
- 8☿︎ Mercury13:52 – 14:34
- 9☽︎ Moon14:34 – 15:17
- 10♄︎ Saturn15:17 – 16:00
- 11♃︎ Jupiter16:00 – 16:43
- 12♂︎ Mars16:43 – 17:25
Night
- 1☉︎ Sun17:25 – 18:43
- 2♀︎ Venus18:43 – 20:00
- 3☿︎ Mercury20:00 – 21:17
- 4☽︎ Moon21:17 – 22:34
- 5♄︎ Saturn22:34 – 23:52
- 6♃︎ Jupiter23:52 – 01:09
- 7♂︎ Mars01:09 – 02:26
- 8☉︎ Sun02:26 – 03:43
- 9♀︎ Venus03:43 – 05:01
- 10☿︎ Mercury05:01 – 06:18
- 11☽︎ Moon06:18 – 07:35
- 12♄︎ Saturn07:35 – 08:52
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Wednesday, 31 December 2025, the Sun rises at 08:52 and sets at 17:25: the day lasts 8h 33m, that is twelve day hours of 43 min. The night, until the next sunrise at 08:52, lasts 15h 27m: twelve night hours of 1h 17m.
Which planet rules the first hour that day?
Mercury, 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: 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.