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 Wednesday, 9 December 2026: day of Mercury
- 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☿︎ Mercury08:05 – 08:45
- 2☽︎ Moon08:45 – 09:25
- 3♄︎ Saturn09:25 – 10:05
- 4♃︎ Jupiter10:05 – 10:45
- 5♂︎ Mars10:45 – 11:25
- 6☉︎ Sun11:25 – 12:04
- 7♀︎ Venus12:04 – 12:44
- 8☿︎ Mercury12:44 – 13:24
- 9☽︎ Moon13:24 – 14:04
- 10♄︎ Saturn14:04 – 14:44
- 11♃︎ Jupiter14:44 – 15:24
- 12♂︎ Mars15:24 – 16:04
Night
- 1☉︎ Sun16:04 – 17:24
- 2♀︎ Venus17:24 – 18:44
- 3☿︎ Mercury18:44 – 20:04
- 4☽︎ Moon20:04 – 21:24
- 5♄︎ Saturn21:24 – 22:45
- 6♃︎ Jupiter22:45 – 00:05
- 7♂︎ Mars00:05 – 01:25
- 8☉︎ Sun01:25 – 02:45
- 9♀︎ Venus02:45 – 04:06
- 10☿︎ Mercury04:06 – 05:26
- 11☽︎ Moon05:26 – 06:46
- 12♄︎ Saturn06:46 – 08:06
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Wednesday, 9 December 2026, the Sun rises at 08:05 and sets at 16:04: the day lasts 7h 58m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:06, lasts 16h 03m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
Mercury, from 08:05 to 08:45: 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.