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, 23 July 2025: day of Mercury
- Sunrise
- 05:23
- Sunset
- 21:13
- Next sunrise
- 05:25
A day hour lasts 1h 19m; a night hour, 41 min. Local time (Europe/London).
Day
- 1☿︎ Mercury05:23 – 06:42
- 2☽︎ Moon06:42 – 08:02
- 3♄︎ Saturn08:02 – 09:21
- 4♃︎ Jupiter09:21 – 10:40
- 5♂︎ Mars10:40 – 11:59
- 6☉︎ Sun11:59 – 13:18
- 7♀︎ Venus13:18 – 14:37
- 8☿︎ Mercury14:37 – 15:57
- 9☽︎ Moon15:57 – 17:16
- 10♄︎ Saturn17:16 – 18:35
- 11♃︎ Jupiter18:35 – 19:54
- 12♂︎ Mars19:54 – 21:13
Night
- 1☉︎ Sun21:13 – 21:54
- 2♀︎ Venus21:54 – 22:35
- 3☿︎ Mercury22:35 – 23:16
- 4☽︎ Moon23:16 – 23:57
- 5♄︎ Saturn23:57 – 00:38
- 6♃︎ Jupiter00:38 – 01:19
- 7♂︎ Mars01:19 – 02:00
- 8☉︎ Sun02:00 – 02:41
- 9♀︎ Venus02:41 – 03:22
- 10☿︎ Mercury03:22 – 04:03
- 11☽︎ Moon04:03 – 04:44
- 12♄︎ Saturn04:44 – 05:25
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Wednesday, 23 July 2025, the Sun rises at 05:23 and sets at 21:13: the day lasts 15h 50m, that is twelve day hours of 1h 19m. The night, until the next sunrise at 05:25, lasts 8h 11m: twelve night hours of 41 min.
Which planet rules the first hour that day?
Mercury, from 05:23 to 06:42: 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.