Planetary hours
in Najrān.
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, 16 December 2025: day of Mars
- Sunrise
- 06:26
- Sunset
- 17:31
- Next sunrise
- 06:26
A day hour lasts 55 min; a night hour, 1h 05m. Local time (Asia/Riyadh).
Day
- 1♂︎ Mars06:26 – 07:21
- 2☉︎ Sun07:21 – 08:17
- 3♀︎ Venus08:17 – 09:12
- 4☿︎ Mercury09:12 – 10:08
- 5☽︎ Moon10:08 – 11:03
- 6♄︎ Saturn11:03 – 11:59
- 7♃︎ Jupiter11:59 – 12:54
- 8♂︎ Mars12:54 – 13:50
- 9☉︎ Sun13:50 – 14:45
- 10♀︎ Venus14:45 – 15:40
- 11☿︎ Mercury15:40 – 16:36
- 12☽︎ Moon16:36 – 17:31
Night
- 1♄︎ Saturn17:31 – 18:36
- 2♃︎ Jupiter18:36 – 19:41
- 3♂︎ Mars19:41 – 20:45
- 4☉︎ Sun20:45 – 21:50
- 5♀︎ Venus21:50 – 22:54
- 6☿︎ Mercury22:54 – 23:59
- 7☽︎ Moon23:59 – 01:03
- 8♄︎ Saturn01:03 – 02:08
- 9♃︎ Jupiter02:08 – 03:13
- 10♂︎ Mars03:13 – 04:17
- 11☉︎ Sun04:17 – 05:22
- 12♀︎ Venus05:22 – 06:26
Other cities · Saudi Arabia
Questions
How are the planetary hours calculated in Najrān?
On Tuesday, 16 December 2025, the Sun rises at 06:26 and sets at 17:31: the day lasts 11h 05m, that is twelve day hours of 55 min. The night, until the next sunrise at 06:26, lasts 12h 55m: twelve night hours of 1h 05m.
Which planet rules the first hour that day?
Mars, from 06:26 to 07:21: 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.