Planetary hours
in Grenoble.
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 October 2026: day of Mercury
- Sunrise
- 08:00
- Sunset
- 18:42
- Next sunrise
- 08:02
A day hour lasts 53 min; a night hour, 1h 07m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury08:00 – 08:54
- 2☽︎ Moon08:54 – 09:47
- 3♄︎ Saturn09:47 – 10:41
- 4♃︎ Jupiter10:41 – 11:34
- 5♂︎ Mars11:34 – 12:28
- 6☉︎ Sun12:28 – 13:21
- 7♀︎ Venus13:21 – 14:14
- 8☿︎ Mercury14:14 – 15:08
- 9☽︎ Moon15:08 – 16:01
- 10♄︎ Saturn16:01 – 16:55
- 11♃︎ Jupiter16:55 – 17:48
- 12♂︎ Mars17:48 – 18:42
Night
- 1☉︎ Sun18:42 – 19:48
- 2♀︎ Venus19:48 – 20:55
- 3☿︎ Mercury20:55 – 22:02
- 4☽︎ Moon22:02 – 23:08
- 5♄︎ Saturn23:08 – 00:15
- 6♃︎ Jupiter00:15 – 01:22
- 7♂︎ Mars01:22 – 02:28
- 8☉︎ Sun02:28 – 03:35
- 9♀︎ Venus03:35 – 04:42
- 10☿︎ Mercury04:42 – 05:48
- 11☽︎ Moon05:48 – 06:55
- 12♄︎ Saturn06:55 – 08:02
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Wednesday, 21 October 2026, the Sun rises at 08:00 and sets at 18:42: the day lasts 10h 41m, that is twelve day hours of 53 min. The night, until the next sunrise at 08:02, lasts 13h 20m: twelve night hours of 1h 07m.
Which planet rules the first hour that day?
Mercury, from 08:00 to 08:54: 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.