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, 15 January 2026: day of Jupiter
- Sunrise
- 08:48
- Sunset
- 17:43
- Next sunrise
- 08:47
A day hour lasts 45 min; a night hour, 1h 15m. Local time (Europe/Paris).
Day
- 1♃︎ Jupiter08:48 – 09:32
- 2♂︎ Mars09:32 – 10:17
- 3☉︎ Sun10:17 – 11:02
- 4♀︎ Venus11:02 – 11:46
- 5☿︎ Mercury11:46 – 12:31
- 6☽︎ Moon12:31 – 13:15
- 7♄︎ Saturn13:15 – 14:00
- 8♃︎ Jupiter14:00 – 14:44
- 9♂︎ Mars14:44 – 15:29
- 10☉︎ Sun15:29 – 16:14
- 11♀︎ Venus16:14 – 16:58
- 12☿︎ Mercury16:58 – 17:43
Night
- 1☽︎ Moon17:43 – 18:58
- 2♄︎ Saturn18:58 – 20:13
- 3♃︎ Jupiter20:13 – 21:29
- 4♂︎ Mars21:29 – 22:44
- 5☉︎ Sun22:44 – 00:00
- 6♀︎ Venus00:00 – 01:15
- 7☿︎ Mercury01:15 – 02:30
- 8☽︎ Moon02:30 – 03:46
- 9♄︎ Saturn03:46 – 05:01
- 10♃︎ Jupiter05:01 – 06:16
- 11♂︎ Mars06:16 – 07:32
- 12☉︎ Sun07:32 – 08:47
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Thursday, 15 January 2026, the Sun rises at 08:48 and sets at 17:43: the day lasts 8h 55m, that is twelve day hours of 45 min. The night, until the next sunrise at 08:47, lasts 15h 04m: twelve night hours of 1h 15m.
Which planet rules the first hour that day?
Jupiter, from 08:48 to 09:32: 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.