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, 29 May 2026: day of Venus
- Sunrise
- 05:34
- Sunset
- 20:49
- Next sunrise
- 05:34
A day hour lasts 1h 16m; a night hour, 44 min. Local time (Europe/Rome).
Day
- 1♀︎ Venus05:34 – 06:51
- 2☿︎ Mercury06:51 – 08:07
- 3☽︎ Moon08:07 – 09:23
- 4♄︎ Saturn09:23 – 10:39
- 5♃︎ Jupiter10:39 – 11:56
- 6♂︎ Mars11:56 – 13:12
- 7☉︎ Sun13:12 – 14:28
- 8♀︎ Venus14:28 – 15:44
- 9☿︎ Mercury15:44 – 17:00
- 10☽︎ Moon17:00 – 18:17
- 11♄︎ Saturn18:17 – 19:33
- 12♃︎ Jupiter19:33 – 20:49
Night
- 1♂︎ Mars20:49 – 21:33
- 2☉︎ Sun21:33 – 22:17
- 3♀︎ Venus22:17 – 23:00
- 4☿︎ Mercury23:00 – 23:44
- 5☽︎ Moon23:44 – 00:28
- 6♄︎ Saturn00:28 – 01:11
- 7♃︎ Jupiter01:11 – 01:55
- 8♂︎ Mars01:55 – 02:39
- 9☉︎ Sun02:39 – 03:23
- 10♀︎ Venus03:23 – 04:06
- 11☿︎ Mercury04:06 – 04:50
- 12☽︎ Moon04:50 – 05:34
Questions
How are the planetary hours calculated in Bologna?
On Friday, 29 May 2026, the Sun rises at 05:34 and sets at 20:49: the day lasts 15h 15m, that is twelve day hours of 1h 16m. The night, until the next sunrise at 05:34, lasts 8h 45m: twelve night hours of 44 min.
Which planet rules the first hour that day?
Venus, from 05:34 to 06:51: 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.