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 Friday, 29 August 2025: day of Venus
- Sunrise
- 06:20
- Sunset
- 20:05
- Next sunrise
- 06:22
A day hour lasts 1h 09m; a night hour, 51 min. Local time (Europe/London).
Day
- 1♀︎ Venus06:20 – 07:29
- 2☿︎ Mercury07:29 – 08:38
- 3☽︎ Moon08:38 – 09:46
- 4♄︎ Saturn09:46 – 10:55
- 5♃︎ Jupiter10:55 – 12:04
- 6♂︎ Mars12:04 – 13:13
- 7☉︎ Sun13:13 – 14:21
- 8♀︎ Venus14:21 – 15:30
- 9☿︎ Mercury15:30 – 16:39
- 10☽︎ Moon16:39 – 17:47
- 11♄︎ Saturn17:47 – 18:56
- 12♃︎ Jupiter18:56 – 20:05
Night
- 1♂︎ Mars20:05 – 20:56
- 2☉︎ Sun20:56 – 21:48
- 3♀︎ Venus21:48 – 22:39
- 4☿︎ Mercury22:39 – 23:30
- 5☽︎ Moon23:30 – 00:22
- 6♄︎ Saturn00:22 – 01:13
- 7♃︎ Jupiter01:13 – 02:05
- 8♂︎ Mars02:05 – 02:56
- 9☉︎ Sun02:56 – 03:48
- 10♀︎ Venus03:48 – 04:39
- 11☿︎ Mercury04:39 – 05:30
- 12☽︎ Moon05:30 – 06:22
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Friday, 29 August 2025, the Sun rises at 06:20 and sets at 20:05: the day lasts 13h 44m, that is twelve day hours of 1h 09m. The night, until the next sunrise at 06:22, lasts 10h 17m: twelve night hours of 51 min.
Which planet rules the first hour that day?
Venus, from 06:20 to 07:29: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.