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 Saturday, 17 May 2025: day of Saturn
- Sunrise
- 05:17
- Sunset
- 21:01
- Next sunrise
- 05:16
A day hour lasts 1h 19m; a night hour, 41 min. Local time (Europe/London).
Day
- 1♄︎ Saturn05:17 – 06:36
- 2♃︎ Jupiter06:36 – 07:55
- 3♂︎ Mars07:55 – 09:13
- 4☉︎ Sun09:13 – 10:32
- 5♀︎ Venus10:32 – 11:50
- 6☿︎ Mercury11:50 – 13:09
- 7☽︎ Moon13:09 – 14:28
- 8♄︎ Saturn14:28 – 15:46
- 9♃︎ Jupiter15:46 – 17:05
- 10♂︎ Mars17:05 – 18:24
- 11☉︎ Sun18:24 – 19:42
- 12♀︎ Venus19:42 – 21:01
Night
- 1☿︎ Mercury21:01 – 21:42
- 2☽︎ Moon21:42 – 22:23
- 3♄︎ Saturn22:23 – 23:05
- 4♃︎ Jupiter23:05 – 23:46
- 5♂︎ Mars23:46 – 00:27
- 6☉︎ Sun00:27 – 01:08
- 7♀︎ Venus01:08 – 01:50
- 8☿︎ Mercury01:50 – 02:31
- 9☽︎ Moon02:31 – 03:12
- 10♄︎ Saturn03:12 – 03:53
- 11♃︎ Jupiter03:53 – 04:35
- 12♂︎ Mars04:35 – 05:16
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Saturday, 17 May 2025, the Sun rises at 05:17 and sets at 21:01: the day lasts 15h 43m, that is twelve day hours of 1h 19m. The night, until the next sunrise at 05:16, lasts 8h 15m: twelve night hours of 41 min.
Which planet rules the first hour that day?
Saturn, from 05:17 to 06:36: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.