Planetary hours
in Sayyān.
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, 16 December 2026: day of Mercury
- Sunrise
- 06:21
- Sunset
- 17:35
- Next sunrise
- 06:21
A day hour lasts 56 min; a night hour, 1h 04m. Local time (Asia/Aden).
Day
- 1☿︎ Mercury06:21 – 07:17
- 2☽︎ Moon07:17 – 08:13
- 3♄︎ Saturn08:13 – 09:09
- 4♃︎ Jupiter09:09 – 10:05
- 5♂︎ Mars10:05 – 11:02
- 6☉︎ Sun11:02 – 11:58
- 7♀︎ Venus11:58 – 12:54
- 8☿︎ Mercury12:54 – 13:50
- 9☽︎ Moon13:50 – 14:46
- 10♄︎ Saturn14:46 – 15:42
- 11♃︎ Jupiter15:42 – 16:39
- 12♂︎ Mars16:39 – 17:35
Night
- 1☉︎ Sun17:35 – 18:39
- 2♀︎ Venus18:39 – 19:43
- 3☿︎ Mercury19:43 – 20:46
- 4☽︎ Moon20:46 – 21:50
- 5♄︎ Saturn21:50 – 22:54
- 6♃︎ Jupiter22:54 – 23:58
- 7♂︎ Mars23:58 – 01:02
- 8☉︎ Sun01:02 – 02:06
- 9♀︎ Venus02:06 – 03:10
- 10☿︎ Mercury03:10 – 04:13
- 11☽︎ Moon04:13 – 05:17
- 12♄︎ Saturn05:17 – 06:21
Questions
How are the planetary hours calculated in Sayyān?
On Wednesday, 16 December 2026, the Sun rises at 06:21 and sets at 17:35: the day lasts 11h 14m, that is twelve day hours of 56 min. The night, until the next sunrise at 06:21, lasts 12h 46m: twelve night hours of 1h 04m.
Which planet rules the first hour that day?
Mercury, from 06:21 to 07:17: 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.