Planetary hours
in Rome.
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 Wednesday, 24 December 2025: day of Mercury
- Sunrise
- 07:35
- Sunset
- 16:43
- Next sunrise
- 07:36
A day hour lasts 46 min; a night hour, 1h 14m. Local time (Europe/Rome).
Day
- 1☿︎ Mercury07:35 – 08:21
- 2☽︎ Moon08:21 – 09:06
- 3♄︎ Saturn09:06 – 09:52
- 4♃︎ Jupiter09:52 – 10:38
- 5♂︎ Mars10:38 – 11:23
- 6☉︎ Sun11:23 – 12:09
- 7♀︎ Venus12:09 – 12:55
- 8☿︎ Mercury12:55 – 13:40
- 9☽︎ Moon13:40 – 14:26
- 10♄︎ Saturn14:26 – 15:12
- 11♃︎ Jupiter15:12 – 15:57
- 12♂︎ Mars15:57 – 16:43
Night
- 1☉︎ Sun16:43 – 17:57
- 2♀︎ Venus17:57 – 19:12
- 3☿︎ Mercury19:12 – 20:26
- 4☽︎ Moon20:26 – 21:41
- 5♄︎ Saturn21:41 – 22:55
- 6♃︎ Jupiter22:55 – 00:09
- 7♂︎ Mars00:09 – 01:24
- 8☉︎ Sun01:24 – 02:38
- 9♀︎ Venus02:38 – 03:52
- 10☿︎ Mercury03:52 – 05:07
- 11☽︎ Moon05:07 – 06:21
- 12♄︎ Saturn06:21 – 07:36
Questions
How are the planetary hours calculated in Rome?
On Wednesday, 24 December 2025, the Sun rises at 07:35 and sets at 16:43: the day lasts 9h 08m, that is twelve day hours of 46 min. The night, until the next sunrise at 07:36, lasts 14h 52m: twelve night hours of 1h 14m.
Which planet rules the first hour that day?
Mercury, from 07:35 to 08:21: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.