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 Sunday, 21 December 2025: day of the Sun
- Sunrise
- 07:41
- Sunset
- 16:11
- Next sunrise
- 07:41
A day hour lasts 42 min; a night hour, 1h 18m. Local time (Europe/Vienna).
Day
- 1☉︎ Sun07:41 – 08:23
- 2♀︎ Venus08:23 – 09:06
- 3☿︎ Mercury09:06 – 09:48
- 4☽︎ Moon09:48 – 10:31
- 5♄︎ Saturn10:31 – 11:13
- 6♃︎ Jupiter11:13 – 11:56
- 7♂︎ Mars11:56 – 12:38
- 8☉︎ Sun12:38 – 13:21
- 9♀︎ Venus13:21 – 14:03
- 10☿︎ Mercury14:03 – 14:46
- 11☽︎ Moon14:46 – 15:28
- 12♄︎ Saturn15:28 – 16:11
Night
- 1♃︎ Jupiter16:11 – 17:28
- 2♂︎ Mars17:28 – 18:46
- 3☉︎ Sun18:46 – 20:04
- 4♀︎ Venus20:04 – 21:21
- 5☿︎ Mercury21:21 – 22:39
- 6☽︎ Moon22:39 – 23:56
- 7♄︎ Saturn23:56 – 01:14
- 8♃︎ Jupiter01:14 – 02:31
- 9♂︎ Mars02:31 – 03:49
- 10☉︎ Sun03:49 – 05:06
- 11♀︎ Venus05:06 – 06:24
- 12☿︎ Mercury06:24 – 07:41
Other cities · Austria
Questions
How are the planetary hours calculated in Graz?
On Sunday, 21 December 2025, the Sun rises at 07:41 and sets at 16:11: the day lasts 8h 30m, that is twelve day hours of 42 min. The night, until the next sunrise at 07:41, lasts 15h 31m: twelve night hours of 1h 18m.
Which planet rules the first hour that day?
The Sun, from 07:41 to 08:23: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.