Planetary hours
in Ruiru.
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 Friday, 4 December 2026: day of Venus
- Sunrise
- 06:16
- Sunset
- 18:27
- Next sunrise
- 06:17
A day hour lasts 1h 01m; a night hour, 59 min. Local time (Africa/Nairobi).
Day
- 1♀︎ Venus06:16 – 07:17
- 2☿︎ Mercury07:17 – 08:18
- 3☽︎ Moon08:18 – 09:19
- 4♄︎ Saturn09:19 – 10:20
- 5♃︎ Jupiter10:20 – 11:21
- 6♂︎ Mars11:21 – 12:22
- 7☉︎ Sun12:22 – 13:23
- 8♀︎ Venus13:23 – 14:24
- 9☿︎ Mercury14:24 – 15:25
- 10☽︎ Moon15:25 – 16:26
- 11♄︎ Saturn16:26 – 17:26
- 12♃︎ Jupiter17:26 – 18:27
Night
- 1♂︎ Mars18:27 – 19:26
- 2☉︎ Sun19:26 – 20:26
- 3♀︎ Venus20:26 – 21:25
- 4☿︎ Mercury21:25 – 22:24
- 5☽︎ Moon22:24 – 23:23
- 6♄︎ Saturn23:23 – 00:22
- 7♃︎ Jupiter00:22 – 01:21
- 8♂︎ Mars01:21 – 02:20
- 9☉︎ Sun02:20 – 03:19
- 10♀︎ Venus03:19 – 04:18
- 11☿︎ Mercury04:18 – 05:18
- 12☽︎ Moon05:18 – 06:17
Questions
How are the planetary hours calculated in Ruiru?
On Friday, 4 December 2026, the Sun rises at 06:16 and sets at 18:27: the day lasts 12h 11m, that is twelve day hours of 1h 01m. The night, until the next sunrise at 06:17, lasts 11h 49m: twelve night hours of 59 min.
Which planet rules the first hour that day?
Venus, from 06:16 to 07:17: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.