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, 15 September 2026: day of Mars
- Sunrise
- 07:43
- Sunset
- 20:18
- Next sunrise
- 07:44
A day hour lasts 1h 03m; a night hour, 57 min. Local time (Europe/Paris).
Day
- 1♂︎ Mars07:43 – 08:46
- 2☉︎ Sun08:46 – 09:49
- 3♀︎ Venus09:49 – 10:52
- 4☿︎ Mercury10:52 – 11:55
- 5☽︎ Moon11:55 – 12:58
- 6♄︎ Saturn12:58 – 14:00
- 7♃︎ Jupiter14:00 – 15:03
- 8♂︎ Mars15:03 – 16:06
- 9☉︎ Sun16:06 – 17:09
- 10♀︎ Venus17:09 – 18:12
- 11☿︎ Mercury18:12 – 19:15
- 12☽︎ Moon19:15 – 20:18
Night
- 1♄︎ Saturn20:18 – 21:15
- 2♃︎ Jupiter21:15 – 22:12
- 3♂︎ Mars22:12 – 23:10
- 4☉︎ Sun23:10 – 00:07
- 5♀︎ Venus00:07 – 01:04
- 6☿︎ Mercury01:04 – 02:01
- 7☽︎ Moon02:01 – 02:58
- 8♄︎ Saturn02:58 – 03:56
- 9♃︎ Jupiter03:56 – 04:53
- 10♂︎ Mars04:53 – 05:50
- 11☉︎ Sun05:50 – 06:47
- 12♀︎ Venus06:47 – 07:44
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Tuesday, 15 September 2026, the Sun rises at 07:43 and sets at 20:18: the day lasts 12h 35m, that is twelve day hours of 1h 03m. The night, until the next sunrise at 07:44, lasts 11h 26m: twelve night hours of 57 min.
Which planet rules the first hour that day?
Mars, from 07:43 to 08:46: 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.