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, 21 May 2026: day of Jupiter
- Sunrise
- 05:12
- Sunset
- 21:06
- Next sunrise
- 05:11
A day hour lasts 1h 19m; a night hour, 40 min. Local time (Europe/London).
Day
- 1♃︎ Jupiter05:12 – 06:32
- 2♂︎ Mars06:32 – 07:51
- 3☉︎ Sun07:51 – 09:11
- 4♀︎ Venus09:11 – 10:30
- 5☿︎ Mercury10:30 – 11:50
- 6☽︎ Moon11:50 – 13:09
- 7♄︎ Saturn13:09 – 14:29
- 8♃︎ Jupiter14:29 – 15:48
- 9♂︎ Mars15:48 – 17:08
- 10☉︎ Sun17:08 – 18:27
- 11♀︎ Venus18:27 – 19:47
- 12☿︎ Mercury19:47 – 21:06
Night
- 1☽︎ Moon21:06 – 21:47
- 2♄︎ Saturn21:47 – 22:27
- 3♃︎ Jupiter22:27 – 23:07
- 4♂︎ Mars23:07 – 23:48
- 5☉︎ Sun23:48 – 00:28
- 6♀︎ Venus00:28 – 01:09
- 7☿︎ Mercury01:09 – 01:49
- 8☽︎ Moon01:49 – 02:29
- 9♄︎ Saturn02:29 – 03:10
- 10♃︎ Jupiter03:10 – 03:50
- 11♂︎ Mars03:50 – 04:31
- 12☉︎ Sun04:31 – 05:11
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Thursday, 21 May 2026, the Sun rises at 05:12 and sets at 21:06: the day lasts 15h 54m, that is twelve day hours of 1h 19m. The night, until the next sunrise at 05:11, lasts 8h 05m: twelve night hours of 40 min.
Which planet rules the first hour that day?
Jupiter, from 05:12 to 06:32: 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.