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 Friday, 31 July 2026: day of Venus
- Sunrise
- 06:00
- Sunset
- 20:41
- Next sunrise
- 06:01
A day hour lasts 1h 13m; a night hour, 47 min. Local time (Europe/Rome).
Day
- 1♀︎ Venus06:00 – 07:13
- 2☿︎ Mercury07:13 – 08:27
- 3☽︎ Moon08:27 – 09:40
- 4♄︎ Saturn09:40 – 10:53
- 5♃︎ Jupiter10:53 – 12:07
- 6♂︎ Mars12:07 – 13:20
- 7☉︎ Sun13:20 – 14:34
- 8♀︎ Venus14:34 – 15:47
- 9☿︎ Mercury15:47 – 17:00
- 10☽︎ Moon17:00 – 18:14
- 11♄︎ Saturn18:14 – 19:27
- 12♃︎ Jupiter19:27 – 20:41
Night
- 1♂︎ Mars20:41 – 21:27
- 2☉︎ Sun21:27 – 22:14
- 3♀︎ Venus22:14 – 23:01
- 4☿︎ Mercury23:01 – 23:47
- 5☽︎ Moon23:47 – 00:34
- 6♄︎ Saturn00:34 – 01:21
- 7♃︎ Jupiter01:21 – 02:07
- 8♂︎ Mars02:07 – 02:54
- 9☉︎ Sun02:54 – 03:41
- 10♀︎ Venus03:41 – 04:27
- 11☿︎ Mercury04:27 – 05:14
- 12☽︎ Moon05:14 – 06:01
Questions
How are the planetary hours calculated in Bologna?
On Friday, 31 July 2026, the Sun rises at 06:00 and sets at 20:41: the day lasts 14h 41m, that is twelve day hours of 1h 13m. The night, until the next sunrise at 06:01, lasts 9h 20m: twelve night hours of 47 min.
Which planet rules the first hour that day?
Venus, from 06:00 to 07:13: 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.