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, 30 December 2026: day of Mercury
- Sunrise
- 07:50
- Sunset
- 16:43
- Next sunrise
- 07:50
A day hour lasts 44 min; a night hour, 1h 16m. Local time (Europe/Rome).
Day
- 1☿︎ Mercury07:50 – 08:35
- 2☽︎ Moon08:35 – 09:19
- 3♄︎ Saturn09:19 – 10:04
- 4♃︎ Jupiter10:04 – 10:48
- 5♂︎ Mars10:48 – 11:32
- 6☉︎ Sun11:32 – 12:17
- 7♀︎ Venus12:17 – 13:01
- 8☿︎ Mercury13:01 – 13:45
- 9☽︎ Moon13:45 – 14:30
- 10♄︎ Saturn14:30 – 15:14
- 11♃︎ Jupiter15:14 – 15:59
- 12♂︎ Mars15:59 – 16:43
Night
- 1☉︎ Sun16:43 – 17:59
- 2♀︎ Venus17:59 – 19:14
- 3☿︎ Mercury19:14 – 20:30
- 4☽︎ Moon20:30 – 21:46
- 5♄︎ Saturn21:46 – 23:01
- 6♃︎ Jupiter23:01 – 00:17
- 7♂︎ Mars00:17 – 01:32
- 8☉︎ Sun01:32 – 02:48
- 9♀︎ Venus02:48 – 04:04
- 10☿︎ Mercury04:04 – 05:19
- 11☽︎ Moon05:19 – 06:35
- 12♄︎ Saturn06:35 – 07:50
Questions
How are the planetary hours calculated in Bologna?
On Wednesday, 30 December 2026, the Sun rises at 07:50 and sets at 16:43: the day lasts 8h 53m, that is twelve day hours of 44 min. The night, until the next sunrise at 07:50, lasts 15h 07m: twelve night hours of 1h 16m.
Which planet rules the first hour that day?
Mercury, from 07:50 to 08:35: 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.