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 Monday, 21 December 2026: day of the Moon
- Sunrise
- 08:15
- Sunset
- 16:05
- Next sunrise
- 08:16
A day hour lasts 39 min; a night hour, 1h 21m. Local time (Europe/London).
Day
- 1☽︎ Moon08:15 – 08:54
- 2♄︎ Saturn08:54 – 09:34
- 3♃︎ Jupiter09:34 – 10:13
- 4♂︎ Mars10:13 – 10:52
- 5☉︎ Sun10:52 – 11:31
- 6♀︎ Venus11:31 – 12:10
- 7☿︎ Mercury12:10 – 12:49
- 8☽︎ Moon12:49 – 13:29
- 9♄︎ Saturn13:29 – 14:08
- 10♃︎ Jupiter14:08 – 14:47
- 11♂︎ Mars14:47 – 15:26
- 12☉︎ Sun15:26 – 16:05
Night
- 1♀︎ Venus16:05 – 17:26
- 2☿︎ Mercury17:26 – 18:47
- 3☽︎ Moon18:47 – 20:08
- 4♄︎ Saturn20:08 – 21:29
- 5♃︎ Jupiter21:29 – 22:50
- 6♂︎ Mars22:50 – 00:11
- 7☉︎ Sun00:11 – 01:31
- 8♀︎ Venus01:31 – 02:52
- 9☿︎ Mercury02:52 – 04:13
- 10☽︎ Moon04:13 – 05:34
- 11♄︎ Saturn05:34 – 06:55
- 12♃︎ Jupiter06:55 – 08:16
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Monday, 21 December 2026, the Sun rises at 08:15 and sets at 16:05: the day lasts 7h 50m, that is twelve day hours of 39 min. The night, until the next sunrise at 08:16, lasts 16h 11m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
The Moon, from 08:15 to 08:54: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Saturn, Jupiter, Mars, the Sun, Venus, Mercury, then the Moon 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.