Planetary hours
in Tainan.
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, 24 December 2025: day of Mercury
- Sunrise
- 06:36
- Sunset
- 17:20
- Next sunrise
- 06:37
A day hour lasts 54 min; a night hour, 1h 06m. Local time (Asia/Taipei).
Day
- 1☿︎ Mercury06:36 – 07:30
- 2☽︎ Moon07:30 – 08:24
- 3♄︎ Saturn08:24 – 09:17
- 4♃︎ Jupiter09:17 – 10:11
- 5♂︎ Mars10:11 – 11:05
- 6☉︎ Sun11:05 – 11:58
- 7♀︎ Venus11:58 – 12:52
- 8☿︎ Mercury12:52 – 13:45
- 9☽︎ Moon13:45 – 14:39
- 10♄︎ Saturn14:39 – 15:33
- 11♃︎ Jupiter15:33 – 16:26
- 12♂︎ Mars16:26 – 17:20
Night
- 1☉︎ Sun17:20 – 18:26
- 2♀︎ Venus18:26 – 19:33
- 3☿︎ Mercury19:33 – 20:39
- 4☽︎ Moon20:39 – 21:46
- 5♄︎ Saturn21:46 – 22:52
- 6♃︎ Jupiter22:52 – 23:58
- 7♂︎ Mars23:58 – 01:05
- 8☉︎ Sun01:05 – 02:11
- 9♀︎ Venus02:11 – 03:18
- 10☿︎ Mercury03:18 – 04:24
- 11☽︎ Moon04:24 – 05:30
- 12♄︎ Saturn05:30 – 06:37
Other cities · Taiwan
Questions
How are the planetary hours calculated in Tainan?
On Wednesday, 24 December 2025, the Sun rises at 06:36 and sets at 17:20: the day lasts 10h 44m, that is twelve day hours of 54 min. The night, until the next sunrise at 06:37, lasts 13h 17m: twelve night hours of 1h 06m.
Which planet rules the first hour that day?
Mercury, from 06:36 to 07:30: 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.