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, 25 December 2025: day of Jupiter
- Sunrise
- 08:17
- Sunset
- 16:08
- Next sunrise
- 08:17
A day hour lasts 39 min; a night hour, 1h 21m. Local time (Europe/London).
Day
- 1♃︎ Jupiter08:17 – 08:56
- 2♂︎ Mars08:56 – 09:35
- 3☉︎ Sun09:35 – 10:15
- 4♀︎ Venus10:15 – 10:54
- 5☿︎ Mercury10:54 – 11:33
- 6☽︎ Moon11:33 – 12:12
- 7♄︎ Saturn12:12 – 12:52
- 8♃︎ Jupiter12:52 – 13:31
- 9♂︎ Mars13:31 – 14:10
- 10☉︎ Sun14:10 – 14:49
- 11♀︎ Venus14:49 – 15:29
- 12☿︎ Mercury15:29 – 16:08
Night
- 1☽︎ Moon16:08 – 17:29
- 2♄︎ Saturn17:29 – 18:49
- 3♃︎ Jupiter18:49 – 20:10
- 4♂︎ Mars20:10 – 21:31
- 5☉︎ Sun21:31 – 22:52
- 6♀︎ Venus22:52 – 00:13
- 7☿︎ Mercury00:13 – 01:33
- 8☽︎ Moon01:33 – 02:54
- 9♄︎ Saturn02:54 – 04:15
- 10♃︎ Jupiter04:15 – 05:36
- 11♂︎ Mars05:36 – 06:57
- 12☉︎ Sun06:57 – 08:17
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Thursday, 25 December 2025, the Sun rises at 08:17 and sets at 16:08: the day lasts 7h 51m, that is twelve day hours of 39 min. The night, until the next sunrise at 08:17, lasts 16h 09m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
Jupiter, from 08:17 to 08:56: 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.