Planetary hours
in Rennes.
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, 21 January 2026: day of Mercury
- Sunrise
- 08:47
- Sunset
- 17:49
- Next sunrise
- 08:46
A day hour lasts 45 min; a night hour, 1h 15m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury08:47 – 09:32
- 2☽︎ Moon09:32 – 10:17
- 3♄︎ Saturn10:17 – 11:02
- 4♃︎ Jupiter11:02 – 11:47
- 5♂︎ Mars11:47 – 12:33
- 6☉︎ Sun12:33 – 13:18
- 7♀︎ Venus13:18 – 14:03
- 8☿︎ Mercury14:03 – 14:48
- 9☽︎ Moon14:48 – 15:33
- 10♄︎ Saturn15:33 – 16:18
- 11♃︎ Jupiter16:18 – 17:04
- 12♂︎ Mars17:04 – 17:49
Night
- 1☉︎ Sun17:49 – 19:03
- 2♀︎ Venus19:03 – 20:18
- 3☿︎ Mercury20:18 – 21:33
- 4☽︎ Moon21:33 – 22:48
- 5♄︎ Saturn22:48 – 00:02
- 6♃︎ Jupiter00:02 – 01:17
- 7♂︎ Mars01:17 – 02:32
- 8☉︎ Sun02:32 – 03:47
- 9♀︎ Venus03:47 – 05:01
- 10☿︎ Mercury05:01 – 06:16
- 11☽︎ Moon06:16 – 07:31
- 12♄︎ Saturn07:31 – 08:46
Other cities · France
Questions
How are the planetary hours calculated in Rennes?
On Wednesday, 21 January 2026, the Sun rises at 08:47 and sets at 17:49: the day lasts 9h 02m, that is twelve day hours of 45 min. The night, until the next sunrise at 08:46, lasts 14h 57m: twelve night hours of 1h 15m.
Which planet rules the first hour that day?
Mercury, from 08:47 to 09:32: 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.