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, 18 August 2026: day of Mars
- Sunrise
- 07:06
- Sunset
- 21:12
- Next sunrise
- 07:08
A day hour lasts 1h 10m; a night hour, 50 min. Local time (Europe/Paris).
Day
- 1♂︎ Mars07:06 – 08:17
- 2☉︎ Sun08:17 – 09:27
- 3♀︎ Venus09:27 – 10:38
- 4☿︎ Mercury10:38 – 11:48
- 5☽︎ Moon11:48 – 12:59
- 6♄︎ Saturn12:59 – 14:09
- 7♃︎ Jupiter14:09 – 15:20
- 8♂︎ Mars15:20 – 16:30
- 9☉︎ Sun16:30 – 17:41
- 10♀︎ Venus17:41 – 18:51
- 11☿︎ Mercury18:51 – 20:02
- 12☽︎ Moon20:02 – 21:12
Night
- 1♄︎ Saturn21:12 – 22:02
- 2♃︎ Jupiter22:02 – 22:51
- 3♂︎ Mars22:51 – 23:41
- 4☉︎ Sun23:41 – 00:31
- 5♀︎ Venus00:31 – 01:20
- 6☿︎ Mercury01:20 – 02:10
- 7☽︎ Moon02:10 – 02:59
- 8♄︎ Saturn02:59 – 03:49
- 9♃︎ Jupiter03:49 – 04:39
- 10♂︎ Mars04:39 – 05:28
- 11☉︎ Sun05:28 – 06:18
- 12♀︎ Venus06:18 – 07:08
Other cities · France
Questions
How are the planetary hours calculated in Nantes?
On Tuesday, 18 August 2026, the Sun rises at 07:06 and sets at 21:12: the day lasts 14h 06m, that is twelve day hours of 1h 10m. The night, until the next sunrise at 07:08, lasts 9h 56m: twelve night hours of 50 min.
Which planet rules the first hour that day?
Mars, from 07:06 to 08:17: 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.