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, 26 December 2025: day of Venus
- Sunrise
- 08:17
- Sunset
- 16:09
- Next sunrise
- 08:18
A day hour lasts 39 min; a night hour, 1h 21m. Local time (Europe/London).
Day
- 1♀︎ Venus08:17 – 08:57
- 2☿︎ Mercury08:57 – 09:36
- 3☽︎ Moon09:36 – 10:15
- 4♄︎ Saturn10:15 – 10:54
- 5♃︎ Jupiter10:54 – 11:34
- 6♂︎ Mars11:34 – 12:13
- 7☉︎ Sun12:13 – 12:52
- 8♀︎ Venus12:52 – 13:31
- 9☿︎ Mercury13:31 – 14:11
- 10☽︎ Moon14:11 – 14:50
- 11♄︎ Saturn14:50 – 15:29
- 12♃︎ Jupiter15:29 – 16:09
Night
- 1♂︎ Mars16:09 – 17:29
- 2☉︎ Sun17:29 – 18:50
- 3♀︎ Venus18:50 – 20:11
- 4☿︎ Mercury20:11 – 21:32
- 5☽︎ Moon21:32 – 22:52
- 6♄︎ Saturn22:52 – 00:13
- 7♃︎ Jupiter00:13 – 01:34
- 8♂︎ Mars01:34 – 02:55
- 9☉︎ Sun02:55 – 04:15
- 10♀︎ Venus04:15 – 05:36
- 11☿︎ Mercury05:36 – 06:57
- 12☽︎ Moon06:57 – 08:18
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Friday, 26 December 2025, the Sun rises at 08:17 and sets at 16:09: the day lasts 7h 51m, that is twelve day hours of 39 min. The night, until the next sunrise at 08:18, lasts 16h 09m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
Venus, from 08:17 to 08:57: 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.