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 Friday, 21 August 2026: day of Venus
- Sunrise
- 06:45
- Sunset
- 20:34
- Next sunrise
- 06:46
A day hour lasts 1h 09m; a night hour, 51 min. Local time (Europe/Paris).
Day
- 1♀︎ Venus06:45 – 07:54
- 2☿︎ Mercury07:54 – 09:03
- 3☽︎ Moon09:03 – 10:12
- 4♄︎ Saturn10:12 – 11:21
- 5♃︎ Jupiter11:21 – 12:30
- 6♂︎ Mars12:30 – 13:39
- 7☉︎ Sun13:39 – 14:48
- 8♀︎ Venus14:48 – 15:58
- 9☿︎ Mercury15:58 – 17:07
- 10☽︎ Moon17:07 – 18:16
- 11♄︎ Saturn18:16 – 19:25
- 12♃︎ Jupiter19:25 – 20:34
Night
- 1♂︎ Mars20:34 – 21:25
- 2☉︎ Sun21:25 – 22:16
- 3♀︎ Venus22:16 – 23:07
- 4☿︎ Mercury23:07 – 23:58
- 5☽︎ Moon23:58 – 00:49
- 6♄︎ Saturn00:49 – 01:40
- 7♃︎ Jupiter01:40 – 02:31
- 8♂︎ Mars02:31 – 03:22
- 9☉︎ Sun03:22 – 04:13
- 10♀︎ Venus04:13 – 05:04
- 11☿︎ Mercury05:04 – 05:55
- 12☽︎ Moon05:55 – 06:46
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Friday, 21 August 2026, the Sun rises at 06:45 and sets at 20:34: the day lasts 13h 49m, that is twelve day hours of 1h 09m. The night, until the next sunrise at 06:46, lasts 10h 13m: twelve night hours of 51 min.
Which planet rules the first hour that day?
Venus, from 06:45 to 07:54: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.