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 Thursday, 4 December 2025: day of Jupiter
- Sunrise
- 08:00
- Sunset
- 16:05
- Next sunrise
- 08:01
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/London).
Day
- 1♃︎ Jupiter08:00 – 08:40
- 2♂︎ Mars08:40 – 09:21
- 3☉︎ Sun09:21 – 10:01
- 4♀︎ Venus10:01 – 10:41
- 5☿︎ Mercury10:41 – 11:22
- 6☽︎ Moon11:22 – 12:02
- 7♄︎ Saturn12:02 – 12:43
- 8♃︎ Jupiter12:43 – 13:23
- 9♂︎ Mars13:23 – 14:04
- 10☉︎ Sun14:04 – 14:44
- 11♀︎ Venus14:44 – 15:25
- 12☿︎ Mercury15:25 – 16:05
Night
- 1☽︎ Moon16:05 – 17:25
- 2♄︎ Saturn17:25 – 18:44
- 3♃︎ Jupiter18:44 – 20:04
- 4♂︎ Mars20:04 – 21:24
- 5☉︎ Sun21:24 – 22:43
- 6♀︎ Venus22:43 – 00:03
- 7☿︎ Mercury00:03 – 01:23
- 8☽︎ Moon01:23 – 02:42
- 9♄︎ Saturn02:42 – 04:02
- 10♃︎ Jupiter04:02 – 05:22
- 11♂︎ Mars05:22 – 06:41
- 12☉︎ Sun06:41 – 08:01
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Thursday, 4 December 2025, the Sun rises at 08:00 and sets at 16:05: the day lasts 8h 05m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:01, lasts 15h 56m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
Jupiter, from 08:00 to 08:40: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.