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 Thursday, 1 May 2025: day of Jupiter
- Sunrise
- 06:05
- Sunset
- 20:19
- Next sunrise
- 06:03
A day hour lasts 1h 11m; a night hour, 49 min. Local time (Europe/Rome).
Day
- 1♃︎ Jupiter06:05 – 07:16
- 2♂︎ Mars07:16 – 08:27
- 3☉︎ Sun08:27 – 09:38
- 4♀︎ Venus09:38 – 10:49
- 5☿︎ Mercury10:49 – 12:00
- 6☽︎ Moon12:00 – 13:12
- 7♄︎ Saturn13:12 – 14:23
- 8♃︎ Jupiter14:23 – 15:34
- 9♂︎ Mars15:34 – 16:45
- 10☉︎ Sun16:45 – 17:56
- 11♀︎ Venus17:56 – 19:08
- 12☿︎ Mercury19:08 – 20:19
Night
- 1☽︎ Moon20:19 – 21:07
- 2♄︎ Saturn21:07 – 21:56
- 3♃︎ Jupiter21:56 – 22:45
- 4♂︎ Mars22:45 – 23:33
- 5☉︎ Sun23:33 – 00:22
- 6♀︎ Venus00:22 – 01:11
- 7☿︎ Mercury01:11 – 02:00
- 8☽︎ Moon02:00 – 02:48
- 9♄︎ Saturn02:48 – 03:37
- 10♃︎ Jupiter03:37 – 04:26
- 11♂︎ Mars04:26 – 05:14
- 12☉︎ Sun05:14 – 06:03
Questions
How are the planetary hours calculated in Bologna?
On Thursday, 1 May 2025, the Sun rises at 06:05 and sets at 20:19: the day lasts 14h 14m, that is twelve day hours of 1h 11m. The night, until the next sunrise at 06:03, lasts 9h 44m: twelve night hours of 49 min.
Which planet rules the first hour that day?
Jupiter, from 06:05 to 07:16: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.