Planetary hours
in Dortmund.
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, 31 December 2025: day of Mercury
- Sunrise
- 08:35
- Sunset
- 16:30
- Next sunrise
- 08:35
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/Berlin).
Day
- 1☿︎ Mercury08:35 – 09:15
- 2☽︎ Moon09:15 – 09:54
- 3♄︎ Saturn09:54 – 10:34
- 4♃︎ Jupiter10:34 – 11:14
- 5♂︎ Mars11:14 – 11:53
- 6☉︎ Sun11:53 – 12:33
- 7♀︎ Venus12:33 – 13:12
- 8☿︎ Mercury13:12 – 13:52
- 9☽︎ Moon13:52 – 14:32
- 10♄︎ Saturn14:32 – 15:11
- 11♃︎ Jupiter15:11 – 15:51
- 12♂︎ Mars15:51 – 16:30
Night
- 1☉︎ Sun16:30 – 17:51
- 2♀︎ Venus17:51 – 19:11
- 3☿︎ Mercury19:11 – 20:32
- 4☽︎ Moon20:32 – 21:52
- 5♄︎ Saturn21:52 – 23:12
- 6♃︎ Jupiter23:12 – 00:33
- 7♂︎ Mars00:33 – 01:53
- 8☉︎ Sun01:53 – 03:14
- 9♀︎ Venus03:14 – 04:34
- 10☿︎ Mercury04:34 – 05:54
- 11☽︎ Moon05:54 – 07:15
- 12♄︎ Saturn07:15 – 08:35
Other cities · Germany
Questions
How are the planetary hours calculated in Dortmund?
On Wednesday, 31 December 2025, the Sun rises at 08:35 and sets at 16:30: the day lasts 7h 55m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:35, lasts 16h 05m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
Mercury, from 08:35 to 09:15: 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.