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, 17 August 2026: day of the Moon
- Sunrise
- 06:01
- Sunset
- 20:31
- Next sunrise
- 06:02
A day hour lasts 1h 12m; a night hour, 48 min. Local time (Europe/London).
Day
- 1☽︎ Moon06:01 – 07:13
- 2♄︎ Saturn07:13 – 08:26
- 3♃︎ Jupiter08:26 – 09:38
- 4♂︎ Mars09:38 – 10:51
- 5☉︎ Sun10:51 – 12:03
- 6♀︎ Venus12:03 – 13:16
- 7☿︎ Mercury13:16 – 14:28
- 8☽︎ Moon14:28 – 15:41
- 9♄︎ Saturn15:41 – 16:53
- 10♃︎ Jupiter16:53 – 18:06
- 11♂︎ Mars18:06 – 19:18
- 12☉︎ Sun19:18 – 20:31
Night
- 1♀︎ Venus20:31 – 21:18
- 2☿︎ Mercury21:18 – 22:06
- 3☽︎ Moon22:06 – 22:54
- 4♄︎ Saturn22:54 – 23:41
- 5♃︎ Jupiter23:41 – 00:29
- 6♂︎ Mars00:29 – 01:17
- 7☉︎ Sun01:17 – 02:04
- 8♀︎ Venus02:04 – 02:52
- 9☿︎ Mercury02:52 – 03:39
- 10☽︎ Moon03:39 – 04:27
- 11♄︎ Saturn04:27 – 05:15
- 12♃︎ Jupiter05:15 – 06:02
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Monday, 17 August 2026, the Sun rises at 06:01 and sets at 20:31: the day lasts 14h 30m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 06:02, lasts 9h 32m: twelve night hours of 48 min.
Which planet rules the first hour that day?
The Moon, from 06:01 to 07:13: 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.