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, 22 October 2025: day of Mercury
- Sunrise
- 08:34
- Sunset
- 19:05
- Next sunrise
- 08:36
A day hour lasts 53 min; a night hour, 1h 08m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury08:34 – 09:27
- 2☽︎ Moon09:27 – 10:19
- 3♄︎ Saturn10:19 – 11:12
- 4♃︎ Jupiter11:12 – 12:05
- 5♂︎ Mars12:05 – 12:57
- 6☉︎ Sun12:57 – 13:50
- 7♀︎ Venus13:50 – 14:42
- 8☿︎ Mercury14:42 – 15:35
- 9☽︎ Moon15:35 – 16:28
- 10♄︎ Saturn16:28 – 17:20
- 11♃︎ Jupiter17:20 – 18:13
- 12♂︎ Mars18:13 – 19:05
Night
- 1☉︎ Sun19:05 – 20:13
- 2♀︎ Venus20:13 – 21:20
- 3☿︎ Mercury21:20 – 22:28
- 4☽︎ Moon22:28 – 23:35
- 5♄︎ Saturn23:35 – 00:43
- 6♃︎ Jupiter00:43 – 01:51
- 7♂︎ Mars01:51 – 02:58
- 8☉︎ Sun02:58 – 04:06
- 9♀︎ Venus04:06 – 05:13
- 10☿︎ Mercury05:13 – 06:21
- 11☽︎ Moon06:21 – 07:28
- 12♄︎ Saturn07:28 – 08:36
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Wednesday, 22 October 2025, the Sun rises at 08:34 and sets at 19:05: the day lasts 10h 31m, that is twelve day hours of 53 min. The night, until the next sunrise at 08:36, lasts 13h 30m: twelve night hours of 1h 08m.
Which planet rules the first hour that day?
Mercury, from 08:34 to 09:27: 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.