Planetary hours
in Florence.
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, 12 September 2025: day of Venus
- Sunrise
- 06:50
- Sunset
- 19:30
- Next sunrise
- 06:52
A day hour lasts 1h 03m; a night hour, 57 min. Local time (Europe/Rome).
Day
- 1♀︎ Venus06:50 – 07:54
- 2☿︎ Mercury07:54 – 08:57
- 3☽︎ Moon08:57 – 10:00
- 4♄︎ Saturn10:00 – 11:04
- 5♃︎ Jupiter11:04 – 12:07
- 6♂︎ Mars12:07 – 13:10
- 7☉︎ Sun13:10 – 14:14
- 8♀︎ Venus14:14 – 15:17
- 9☿︎ Mercury15:17 – 16:20
- 10☽︎ Moon16:20 – 17:24
- 11♄︎ Saturn17:24 – 18:27
- 12♃︎ Jupiter18:27 – 19:30
Night
- 1♂︎ Mars19:30 – 20:27
- 2☉︎ Sun20:27 – 21:24
- 3♀︎ Venus21:24 – 22:21
- 4☿︎ Mercury22:21 – 23:17
- 5☽︎ Moon23:17 – 00:14
- 6♄︎ Saturn00:14 – 01:11
- 7♃︎ Jupiter01:11 – 02:08
- 8♂︎ Mars02:08 – 03:04
- 9☉︎ Sun03:04 – 04:01
- 10♀︎ Venus04:01 – 04:58
- 11☿︎ Mercury04:58 – 05:55
- 12☽︎ Moon05:55 – 06:52
Questions
How are the planetary hours calculated in Florence?
On Friday, 12 September 2025, the Sun rises at 06:50 and sets at 19:30: the day lasts 12h 40m, that is twelve day hours of 1h 03m. The night, until the next sunrise at 06:52, lasts 11h 21m: twelve night hours of 57 min.
Which planet rules the first hour that day?
Venus, from 06:50 to 07:54: 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.