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, 18 August 2025: day of the Moon
- Sunrise
- 06:03
- Sunset
- 20:28
- Next sunrise
- 06:04
A day hour lasts 1h 12m; a night hour, 48 min. Local time (Europe/London).
Day
- 1☽︎ Moon06:03 – 07:15
- 2♄︎ Saturn07:15 – 08:27
- 3♃︎ Jupiter08:27 – 09:39
- 4♂︎ Mars09:39 – 10:51
- 5☉︎ Sun10:51 – 12:03
- 6♀︎ Venus12:03 – 13:15
- 7☿︎ Mercury13:15 – 14:28
- 8☽︎ Moon14:28 – 15:40
- 9♄︎ Saturn15:40 – 16:52
- 10♃︎ Jupiter16:52 – 18:04
- 11♂︎ Mars18:04 – 19:16
- 12☉︎ Sun19:16 – 20:28
Night
- 1♀︎ Venus20:28 – 21:16
- 2☿︎ Mercury21:16 – 22:04
- 3☽︎ Moon22:04 – 22:52
- 4♄︎ Saturn22:52 – 23:40
- 5♃︎ Jupiter23:40 – 00:28
- 6♂︎ Mars00:28 – 01:16
- 7☉︎ Sun01:16 – 02:04
- 8♀︎ Venus02:04 – 02:52
- 9☿︎ Mercury02:52 – 03:40
- 10☽︎ Moon03:40 – 04:28
- 11♄︎ Saturn04:28 – 05:16
- 12♃︎ Jupiter05:16 – 06:04
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Monday, 18 August 2025, the Sun rises at 06:03 and sets at 20:28: the day lasts 14h 25m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 06:04, lasts 9h 36m: twelve night hours of 48 min.
Which planet rules the first hour that day?
The Moon, from 06:03 to 07:15: 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.