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, 20 August 2025: day of Mercury
- Sunrise
- 06:06
- Sunset
- 20:24
- Next sunrise
- 06:08
A day hour lasts 1h 11m; a night hour, 49 min. Local time (Europe/London).
Day
- 1☿︎ Mercury06:06 – 07:18
- 2☽︎ Moon07:18 – 08:29
- 3♄︎ Saturn08:29 – 09:41
- 4♃︎ Jupiter09:41 – 10:52
- 5♂︎ Mars10:52 – 12:04
- 6☉︎ Sun12:04 – 13:15
- 7♀︎ Venus13:15 – 14:27
- 8☿︎ Mercury14:27 – 15:38
- 9☽︎ Moon15:38 – 16:50
- 10♄︎ Saturn16:50 – 18:01
- 11♃︎ Jupiter18:01 – 19:13
- 12♂︎ Mars19:13 – 20:24
Night
- 1☉︎ Sun20:24 – 21:13
- 2♀︎ Venus21:13 – 22:01
- 3☿︎ Mercury22:01 – 22:50
- 4☽︎ Moon22:50 – 23:39
- 5♄︎ Saturn23:39 – 00:27
- 6♃︎ Jupiter00:27 – 01:16
- 7♂︎ Mars01:16 – 02:04
- 8☉︎ Sun02:04 – 02:53
- 9♀︎ Venus02:53 – 03:42
- 10☿︎ Mercury03:42 – 04:30
- 11☽︎ Moon04:30 – 05:19
- 12♄︎ Saturn05:19 – 06:08
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Wednesday, 20 August 2025, the Sun rises at 06:06 and sets at 20:24: the day lasts 14h 18m, that is twelve day hours of 1h 11m. The night, until the next sunrise at 06:08, lasts 9h 44m: twelve night hours of 49 min.
Which planet rules the first hour that day?
Mercury, from 06:06 to 07:18: 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.