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 Tuesday, 21 July 2026: day of Mars
- Sunrise
- 06:34
- Sunset
- 20:20
- Next sunrise
- 06:35
A day hour lasts 1h 09m; a night hour, 51 min. Local time (America/Chicago).
Day
- 1♂︎ Mars06:34 – 07:43
- 2☉︎ Sun07:43 – 08:52
- 3♀︎ Venus08:52 – 10:01
- 4☿︎ Mercury10:01 – 11:10
- 5☽︎ Moon11:10 – 12:18
- 6♄︎ Saturn12:18 – 13:27
- 7♃︎ Jupiter13:27 – 14:36
- 8♂︎ Mars14:36 – 15:45
- 9☉︎ Sun15:45 – 16:54
- 10♀︎ Venus16:54 – 18:03
- 11☿︎ Mercury18:03 – 19:12
- 12☽︎ Moon19:12 – 20:20
Night
- 1♄︎ Saturn20:20 – 21:12
- 2♃︎ Jupiter21:12 – 22:03
- 3♂︎ Mars22:03 – 22:54
- 4☉︎ Sun22:54 – 23:45
- 5♀︎ Venus23:45 – 00:36
- 6☿︎ Mercury00:36 – 01:28
- 7☽︎ Moon01:28 – 02:19
- 8♄︎ Saturn02:19 – 03:10
- 9♃︎ Jupiter03:10 – 04:01
- 10♂︎ Mars04:01 – 04:52
- 11☉︎ Sun04:52 – 05:43
- 12♀︎ Venus05:43 – 06:35
Other cities · United States
Questions
How are the planetary hours calculated in Houston?
On Tuesday, 21 July 2026, the Sun rises at 06:34 and sets at 20:20: the day lasts 13h 46m, that is twelve day hours of 1h 09m. The night, until the next sunrise at 06:35, lasts 10h 14m: twelve night hours of 51 min.
Which planet rules the first hour that day?
Mars, from 06:34 to 07:43: 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.