Planetary hours
in Trieste.
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 Saturday, 20 December 2025: day of Saturn
- Sunrise
- 07:41
- Sunset
- 16:23
- Next sunrise
- 07:42
A day hour lasts 43 min; a night hour, 1h 17m. Local time (Europe/Rome).
Day
- 1♄︎ Saturn07:41 – 08:25
- 2♃︎ Jupiter08:25 – 09:08
- 3♂︎ Mars09:08 – 09:52
- 4☉︎ Sun09:52 – 10:35
- 5♀︎ Venus10:35 – 11:19
- 6☿︎ Mercury11:19 – 12:02
- 7☽︎ Moon12:02 – 12:45
- 8♄︎ Saturn12:45 – 13:29
- 9♃︎ Jupiter13:29 – 14:12
- 10♂︎ Mars14:12 – 14:56
- 11☉︎ Sun14:56 – 15:39
- 12♀︎ Venus15:39 – 16:23
Night
- 1☿︎ Mercury16:23 – 17:39
- 2☽︎ Moon17:39 – 18:56
- 3♄︎ Saturn18:56 – 20:12
- 4♃︎ Jupiter20:12 – 21:29
- 5♂︎ Mars21:29 – 22:46
- 6☉︎ Sun22:46 – 00:02
- 7♀︎ Venus00:02 – 01:19
- 8☿︎ Mercury01:19 – 02:36
- 9☽︎ Moon02:36 – 03:52
- 10♄︎ Saturn03:52 – 05:09
- 11♃︎ Jupiter05:09 – 06:25
- 12♂︎ Mars06:25 – 07:42
Questions
How are the planetary hours calculated in Trieste?
On Saturday, 20 December 2025, the Sun rises at 07:41 and sets at 16:23: the day lasts 8h 41m, that is twelve day hours of 43 min. The night, until the next sunrise at 07:42, lasts 15h 19m: twelve night hours of 1h 17m.
Which planet rules the first hour that day?
Saturn, from 07:41 to 08:25: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.