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 Thursday, 17 December 2026: day of Jupiter
- Sunrise
- 08:13
- Sunset
- 16:04
- Next sunrise
- 08:13
A day hour lasts 39 min; a night hour, 1h 21m. Local time (Europe/London).
Day
- 1♃︎ Jupiter08:13 – 08:52
- 2♂︎ Mars08:52 – 09:31
- 3☉︎ Sun09:31 – 10:11
- 4♀︎ Venus10:11 – 10:50
- 5☿︎ Mercury10:50 – 11:29
- 6☽︎ Moon11:29 – 12:08
- 7♄︎ Saturn12:08 – 12:48
- 8♃︎ Jupiter12:48 – 13:27
- 9♂︎ Mars13:27 – 14:06
- 10☉︎ Sun14:06 – 14:45
- 11♀︎ Venus14:45 – 15:25
- 12☿︎ Mercury15:25 – 16:04
Night
- 1☽︎ Moon16:04 – 17:25
- 2♄︎ Saturn17:25 – 18:45
- 3♃︎ Jupiter18:45 – 20:06
- 4♂︎ Mars20:06 – 21:27
- 5☉︎ Sun21:27 – 22:48
- 6♀︎ Venus22:48 – 00:09
- 7☿︎ Mercury00:09 – 01:29
- 8☽︎ Moon01:29 – 02:50
- 9♄︎ Saturn02:50 – 04:11
- 10♃︎ Jupiter04:11 – 05:32
- 11♂︎ Mars05:32 – 06:53
- 12☉︎ Sun06:53 – 08:13
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Thursday, 17 December 2026, the Sun rises at 08:13 and sets at 16:04: the day lasts 7h 51m, that is twelve day hours of 39 min. The night, until the next sunrise at 08:13, lasts 16h 10m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
Jupiter, from 08:13 to 08:52: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.