Planetary hours
in Houston.
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
- 07:16
- Sunset
- 17:32
- Next sunrise
- 07:16
A day hour lasts 51 min; a night hour, 1h 09m. Local time (America/Chicago).
Day
- 1☿︎ Mercury07:16 – 08:07
- 2☽︎ Moon08:07 – 08:59
- 3♄︎ Saturn08:59 – 09:50
- 4♃︎ Jupiter09:50 – 10:42
- 5♂︎ Mars10:42 – 11:33
- 6☉︎ Sun11:33 – 12:24
- 7♀︎ Venus12:24 – 13:16
- 8☿︎ Mercury13:16 – 14:07
- 9☽︎ Moon14:07 – 14:58
- 10♄︎ Saturn14:58 – 15:50
- 11♃︎ Jupiter15:50 – 16:41
- 12♂︎ Mars16:41 – 17:32
Night
- 1☉︎ Sun17:32 – 18:41
- 2♀︎ Venus18:41 – 19:50
- 3☿︎ Mercury19:50 – 20:58
- 4☽︎ Moon20:58 – 22:07
- 5♄︎ Saturn22:07 – 23:16
- 6♃︎ Jupiter23:16 – 00:24
- 7♂︎ Mars00:24 – 01:33
- 8☉︎ Sun01:33 – 02:42
- 9♀︎ Venus02:42 – 03:50
- 10☿︎ Mercury03:50 – 04:59
- 11☽︎ Moon04:59 – 06:08
- 12♄︎ Saturn06:08 – 07:16
Other cities · United States
Questions
How are the planetary hours calculated in Houston?
On Wednesday, 31 December 2025, the Sun rises at 07:16 and sets at 17:32: the day lasts 10h 16m, that is twelve day hours of 51 min. The night, until the next sunrise at 07:16, lasts 13h 44m: twelve night hours of 1h 09m.
Which planet rules the first hour that day?
Mercury, from 07:16 to 08:07: 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.