Planetary hours
in Bologna.
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, 2 December 2026: day of Mercury
- Sunrise
- 07:31
- Sunset
- 16:35
- Next sunrise
- 07:32
A day hour lasts 45 min; a night hour, 1h 15m. Local time (Europe/Rome).
Day
- 1☿︎ Mercury07:31 – 08:17
- 2☽︎ Moon08:17 – 09:02
- 3♄︎ Saturn09:02 – 09:47
- 4♃︎ Jupiter09:47 – 10:33
- 5♂︎ Mars10:33 – 11:18
- 6☉︎ Sun11:18 – 12:03
- 7♀︎ Venus12:03 – 12:49
- 8☿︎ Mercury12:49 – 13:34
- 9☽︎ Moon13:34 – 14:19
- 10♄︎ Saturn14:19 – 15:05
- 11♃︎ Jupiter15:05 – 15:50
- 12♂︎ Mars15:50 – 16:35
Night
- 1☉︎ Sun16:35 – 17:50
- 2♀︎ Venus17:50 – 19:05
- 3☿︎ Mercury19:05 – 20:20
- 4☽︎ Moon20:20 – 21:34
- 5♄︎ Saturn21:34 – 22:49
- 6♃︎ Jupiter22:49 – 00:04
- 7♂︎ Mars00:04 – 01:19
- 8☉︎ Sun01:19 – 02:33
- 9♀︎ Venus02:33 – 03:48
- 10☿︎ Mercury03:48 – 05:03
- 11☽︎ Moon05:03 – 06:18
- 12♄︎ Saturn06:18 – 07:32
Questions
How are the planetary hours calculated in Bologna?
On Wednesday, 2 December 2026, the Sun rises at 07:31 and sets at 16:35: the day lasts 9h 04m, that is twelve day hours of 45 min. The night, until the next sunrise at 07:32, lasts 14h 57m: twelve night hours of 1h 15m.
Which planet rules the first hour that day?
Mercury, from 07:31 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 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.