Planetary hours
in Chicago.
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 Tuesday, 9 December 2025: day of Mars
- Sunrise
- 07:06
- Sunset
- 16:19
- Next sunrise
- 07:07
A day hour lasts 46 min; a night hour, 1h 14m. Local time (America/Chicago).
Day
- 1♂︎ Mars07:06 – 07:52
- 2☉︎ Sun07:52 – 08:38
- 3♀︎ Venus08:38 – 09:24
- 4☿︎ Mercury09:24 – 10:10
- 5☽︎ Moon10:10 – 10:56
- 6♄︎ Saturn10:56 – 11:43
- 7♃︎ Jupiter11:43 – 12:29
- 8♂︎ Mars12:29 – 13:15
- 9☉︎ Sun13:15 – 14:01
- 10♀︎ Venus14:01 – 14:47
- 11☿︎ Mercury14:47 – 15:33
- 12☽︎ Moon15:33 – 16:19
Night
- 1♄︎ Saturn16:19 – 17:33
- 2♃︎ Jupiter17:33 – 18:47
- 3♂︎ Mars18:47 – 20:01
- 4☉︎ Sun20:01 – 21:15
- 5♀︎ Venus21:15 – 22:29
- 6☿︎ Mercury22:29 – 23:43
- 7☽︎ Moon23:43 – 00:57
- 8♄︎ Saturn00:57 – 02:11
- 9♃︎ Jupiter02:11 – 03:25
- 10♂︎ Mars03:25 – 04:39
- 11☉︎ Sun04:39 – 05:53
- 12♀︎ Venus05:53 – 07:07
Other cities · United States
Questions
How are the planetary hours calculated in Chicago?
On Tuesday, 9 December 2025, the Sun rises at 07:06 and sets at 16:19: the day lasts 9h 13m, that is twelve day hours of 46 min. The night, until the next sunrise at 07:07, lasts 14h 48m: twelve night hours of 1h 14m.
Which planet rules the first hour that day?
Mars, from 07:06 to 07:52: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.