Planetary hours
in Bilbao.
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
- 08:37
- Sunset
- 17:37
- Next sunrise
- 08:38
A day hour lasts 45 min; a night hour, 1h 15m. Local time (Europe/Madrid).
Day
- 1♂︎ Mars08:37 – 09:22
- 2☉︎ Sun09:22 – 10:07
- 3♀︎ Venus10:07 – 10:52
- 4☿︎ Mercury10:52 – 11:37
- 5☽︎ Moon11:37 – 12:22
- 6♄︎ Saturn12:22 – 13:07
- 7♃︎ Jupiter13:07 – 13:52
- 8♂︎ Mars13:52 – 14:37
- 9☉︎ Sun14:37 – 15:22
- 10♀︎ Venus15:22 – 16:07
- 11☿︎ Mercury16:07 – 16:52
- 12☽︎ Moon16:52 – 17:37
Night
- 1♄︎ Saturn17:37 – 18:52
- 2♃︎ Jupiter18:52 – 20:07
- 3♂︎ Mars20:07 – 21:22
- 4☉︎ Sun21:22 – 22:37
- 5♀︎ Venus22:37 – 23:52
- 6☿︎ Mercury23:52 – 01:07
- 7☽︎ Moon01:07 – 02:22
- 8♄︎ Saturn02:22 – 03:37
- 9♃︎ Jupiter03:37 – 04:53
- 10♂︎ Mars04:53 – 06:08
- 11☉︎ Sun06:08 – 07:23
- 12♀︎ Venus07:23 – 08:38
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Questions
How are the planetary hours calculated in Bilbao?
On Tuesday, 16 December 2025, the Sun rises at 08:37 and sets at 17:37: the day lasts 8h 59m, that is twelve day hours of 45 min. The night, until the next sunrise at 08:38, lasts 15h 01m: twelve night hours of 1h 15m.
Which planet rules the first hour that day?
Mars, from 08:37 to 09:22: 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.