Planetary hours
in Arusha.
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, 18 December 2026: day of Venus
- Sunrise
- 06:20
- Sunset
- 18:39
- Next sunrise
- 06:20
A day hour lasts 1h 02m; a night hour, 58 min. Local time (Africa/Dar_es_Salaam).
Day
- 1♀︎ Venus06:20 – 07:21
- 2☿︎ Mercury07:21 – 08:23
- 3☽︎ Moon08:23 – 09:25
- 4♄︎ Saturn09:25 – 10:26
- 5♃︎ Jupiter10:26 – 11:28
- 6♂︎ Mars11:28 – 12:29
- 7☉︎ Sun12:29 – 13:31
- 8♀︎ Venus13:31 – 14:33
- 9☿︎ Mercury14:33 – 15:34
- 10☽︎ Moon15:34 – 16:36
- 11♄︎ Saturn16:36 – 17:37
- 12♃︎ Jupiter17:37 – 18:39
Night
- 1♂︎ Mars18:39 – 19:37
- 2☉︎ Sun19:37 – 20:36
- 3♀︎ Venus20:36 – 21:34
- 4☿︎ Mercury21:34 – 22:33
- 5☽︎ Moon22:33 – 23:31
- 6♄︎ Saturn23:31 – 00:30
- 7♃︎ Jupiter00:30 – 01:28
- 8♂︎ Mars01:28 – 02:26
- 9☉︎ Sun02:26 – 03:25
- 10♀︎ Venus03:25 – 04:23
- 11☿︎ Mercury04:23 – 05:22
- 12☽︎ Moon05:22 – 06:20
Other cities · Tanzania
Questions
How are the planetary hours calculated in Arusha?
On Friday, 18 December 2026, the Sun rises at 06:20 and sets at 18:39: the day lasts 12h 19m, that is twelve day hours of 1h 02m. The night, until the next sunrise at 06:20, lasts 11h 41m: twelve night hours of 58 min.
Which planet rules the first hour that day?
Venus, from 06:20 to 07:21: 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.