Planetary hours
in Cardiff.
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 Monday, 8 December 2025: day of the Moon
- Sunrise
- 08:05
- Sunset
- 16:04
- Next sunrise
- 08:06
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/London).
Day
- 1☽︎ Moon08:05 – 08:44
- 2♄︎ Saturn08:44 – 09:24
- 3♃︎ Jupiter09:24 – 10:04
- 4♂︎ Mars10:04 – 10:44
- 5☉︎ Sun10:44 – 11:24
- 6♀︎ Venus11:24 – 12:04
- 7☿︎ Mercury12:04 – 12:44
- 8☽︎ Moon12:44 – 13:24
- 9♄︎ Saturn13:24 – 14:04
- 10♃︎ Jupiter14:04 – 14:44
- 11♂︎ Mars14:44 – 15:24
- 12☉︎ Sun15:24 – 16:04
Night
- 1♀︎ Venus16:04 – 17:24
- 2☿︎ Mercury17:24 – 18:44
- 3☽︎ Moon18:44 – 20:04
- 4♄︎ Saturn20:04 – 21:24
- 5♃︎ Jupiter21:24 – 22:44
- 6♂︎ Mars22:44 – 00:05
- 7☉︎ Sun00:05 – 01:25
- 8♀︎ Venus01:25 – 02:45
- 9☿︎ Mercury02:45 – 04:05
- 10☽︎ Moon04:05 – 05:25
- 11♄︎ Saturn05:25 – 06:45
- 12♃︎ Jupiter06:45 – 08:06
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Monday, 8 December 2025, the Sun rises at 08:05 and sets at 16:04: the day lasts 7h 59m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:06, lasts 16h 02m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
The Moon, from 08:05 to 08:44: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Saturn, Jupiter, Mars, the Sun, Venus, Mercury, then the Moon 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.