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 Saturday, 20 September 2025: day of Saturn
- Sunrise
- 06:55
- Sunset
- 19:15
- Next sunrise
- 06:57
A day hour lasts 1h 02m; a night hour, 59 min. Local time (Europe/London).
Day
- 1♄︎ Saturn06:55 – 07:57
- 2♃︎ Jupiter07:57 – 08:59
- 3♂︎ Mars08:59 – 10:00
- 4☉︎ Sun10:00 – 11:02
- 5♀︎ Venus11:02 – 12:03
- 6☿︎ Mercury12:03 – 13:05
- 7☽︎ Moon13:05 – 14:07
- 8♄︎ Saturn14:07 – 15:08
- 9♃︎ Jupiter15:08 – 16:10
- 10♂︎ Mars16:10 – 17:12
- 11☉︎ Sun17:12 – 18:13
- 12♀︎ Venus18:13 – 19:15
Night
- 1☿︎ Mercury19:15 – 20:13
- 2☽︎ Moon20:13 – 21:12
- 3♄︎ Saturn21:12 – 22:10
- 4♃︎ Jupiter22:10 – 23:09
- 5♂︎ Mars23:09 – 00:07
- 6☉︎ Sun00:07 – 01:06
- 7♀︎ Venus01:06 – 02:04
- 8☿︎ Mercury02:04 – 03:03
- 9☽︎ Moon03:03 – 04:01
- 10♄︎ Saturn04:01 – 05:00
- 11♃︎ Jupiter05:00 – 05:58
- 12♂︎ Mars05:58 – 06:57
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Saturday, 20 September 2025, the Sun rises at 06:55 and sets at 19:15: the day lasts 12h 19m, that is twelve day hours of 1h 02m. The night, until the next sunrise at 06:57, lasts 11h 42m: twelve night hours of 59 min.
Which planet rules the first hour that day?
Saturn, from 06:55 to 07:57: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.