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 Sunday, 7 December 2025: day of the Sun
- Sunrise
- 08:03
- Sunset
- 16:04
- Next sunrise
- 08:05
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/London).
Day
- 1☉︎ Sun08:03 – 08:43
- 2♀︎ Venus08:43 – 09:23
- 3☿︎ Mercury09:23 – 10:04
- 4☽︎ Moon10:04 – 10:44
- 5♄︎ Saturn10:44 – 11:24
- 6♃︎ Jupiter11:24 – 12:04
- 7♂︎ Mars12:04 – 12:44
- 8☉︎ Sun12:44 – 13:24
- 9♀︎ Venus13:24 – 14:04
- 10☿︎ Mercury14:04 – 14:44
- 11☽︎ Moon14:44 – 15:24
- 12♄︎ Saturn15:24 – 16:04
Night
- 1♃︎ Jupiter16:04 – 17:24
- 2♂︎ Mars17:24 – 18:44
- 3☉︎ Sun18:44 – 20:04
- 4♀︎ Venus20:04 – 21:24
- 5☿︎ Mercury21:24 – 22:44
- 6☽︎ Moon22:44 – 00:04
- 7♄︎ Saturn00:04 – 01:24
- 8♃︎ Jupiter01:24 – 02:44
- 9♂︎ Mars02:44 – 04:04
- 10☉︎ Sun04:04 – 05:24
- 11♀︎ Venus05:24 – 06:44
- 12☿︎ Mercury06:44 – 08:05
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Sunday, 7 December 2025, the Sun rises at 08:03 and sets at 16:04: the day lasts 8h 01m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:05, lasts 16h 01m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
The Sun, from 08:03 to 08:43: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.