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, 18 December 2026: day of Venus
- Sunrise
- 08:13
- Sunset
- 16:04
- Next sunrise
- 08:14
A day hour lasts 39 min; a night hour, 1h 21m. Local time (Europe/London).
Day
- 1♀︎ Venus08:13 – 08:53
- 2☿︎ Mercury08:53 – 09:32
- 3☽︎ Moon09:32 – 10:11
- 4♄︎ Saturn10:11 – 10:50
- 5♃︎ Jupiter10:50 – 11:30
- 6♂︎ Mars11:30 – 12:09
- 7☉︎ Sun12:09 – 12:48
- 8♀︎ Venus12:48 – 13:27
- 9☿︎ Mercury13:27 – 14:06
- 10☽︎ Moon14:06 – 14:46
- 11♄︎ Saturn14:46 – 15:25
- 12♃︎ Jupiter15:25 – 16:04
Night
- 1♂︎ Mars16:04 – 17:25
- 2☉︎ Sun17:25 – 18:46
- 3♀︎ Venus18:46 – 20:07
- 4☿︎ Mercury20:07 – 21:27
- 5☽︎ Moon21:27 – 22:48
- 6♄︎ Saturn22:48 – 00:09
- 7♃︎ Jupiter00:09 – 01:30
- 8♂︎ Mars01:30 – 02:51
- 9☉︎ Sun02:51 – 04:12
- 10♀︎ Venus04:12 – 05:32
- 11☿︎ Mercury05:32 – 06:53
- 12☽︎ Moon06:53 – 08:14
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Friday, 18 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 08:14, lasts 16h 10m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
Venus, from 08:13 to 08:53: 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.