Planetary hours
in Graz.
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 December 2025: day of Venus
- Sunrise
- 07:35
- Sunset
- 16:08
- Next sunrise
- 07:35
A day hour lasts 43 min; a night hour, 1h 17m. Local time (Europe/Vienna).
Day
- 1♀︎ Venus07:35 – 08:17
- 2☿︎ Mercury08:17 – 09:00
- 3☽︎ Moon09:00 – 09:43
- 4♄︎ Saturn09:43 – 10:26
- 5♃︎ Jupiter10:26 – 11:09
- 6♂︎ Mars11:09 – 11:51
- 7☉︎ Sun11:51 – 12:34
- 8♀︎ Venus12:34 – 13:17
- 9☿︎ Mercury13:17 – 14:00
- 10☽︎ Moon14:00 – 14:43
- 11♄︎ Saturn14:43 – 15:25
- 12♃︎ Jupiter15:25 – 16:08
Night
- 1♂︎ Mars16:08 – 17:26
- 2☉︎ Sun17:26 – 18:43
- 3♀︎ Venus18:43 – 20:00
- 4☿︎ Mercury20:00 – 21:17
- 5☽︎ Moon21:17 – 22:35
- 6♄︎ Saturn22:35 – 23:52
- 7♃︎ Jupiter23:52 – 01:09
- 8♂︎ Mars01:09 – 02:26
- 9☉︎ Sun02:26 – 03:44
- 10♀︎ Venus03:44 – 05:01
- 11☿︎ Mercury05:01 – 06:18
- 12☽︎ Moon06:18 – 07:35
Other cities · Austria
Questions
How are the planetary hours calculated in Graz?
On Friday, 12 December 2025, the Sun rises at 07:35 and sets at 16:08: the day lasts 8h 34m, that is twelve day hours of 43 min. The night, until the next sunrise at 07:35, lasts 15h 27m: twelve night hours of 1h 17m.
Which planet rules the first hour that day?
Venus, from 07:35 to 08:17: 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.