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 Saturday, 22 August 2026: day of Saturn
- Sunrise
- 06:25
- Sunset
- 20:08
- Next sunrise
- 06:26
A day hour lasts 1h 09m; a night hour, 51 min. Local time (Europe/Rome).
Day
- 1♄︎ Saturn06:25 – 07:34
- 2♃︎ Jupiter07:34 – 08:42
- 3♂︎ Mars08:42 – 09:51
- 4☉︎ Sun09:51 – 10:59
- 5♀︎ Venus10:59 – 12:08
- 6☿︎ Mercury12:08 – 13:17
- 7☽︎ Moon13:17 – 14:25
- 8♄︎ Saturn14:25 – 15:34
- 9♃︎ Jupiter15:34 – 16:42
- 10♂︎ Mars16:42 – 17:51
- 11☉︎ Sun17:51 – 19:00
- 12♀︎ Venus19:00 – 20:08
Night
- 1☿︎ Mercury20:08 – 21:00
- 2☽︎ Moon21:00 – 21:51
- 3♄︎ Saturn21:51 – 22:43
- 4♃︎ Jupiter22:43 – 23:34
- 5♂︎ Mars23:34 – 00:26
- 6☉︎ Sun00:26 – 01:17
- 7♀︎ Venus01:17 – 02:09
- 8☿︎ Mercury02:09 – 03:00
- 9☽︎ Moon03:00 – 03:52
- 10♄︎ Saturn03:52 – 04:43
- 11♃︎ Jupiter04:43 – 05:35
- 12♂︎ Mars05:35 – 06:26
Questions
How are the planetary hours calculated in Bologna?
On Saturday, 22 August 2026, the Sun rises at 06:25 and sets at 20:08: the day lasts 13h 43m, that is twelve day hours of 1h 09m. The night, until the next sunrise at 06:26, lasts 10h 18m: twelve night hours of 51 min.
Which planet rules the first hour that day?
Saturn, from 06:25 to 07:34: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.