Planetary hours
in London.
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, 23 August 2025: day of Saturn
- Sunrise
- 05:59
- Sunset
- 20:06
- Next sunrise
- 06:00
A day hour lasts 1h 11m; a night hour, 50 min. Local time (Europe/London).
Day
- 1♄︎ Saturn05:59 – 07:09
- 2♃︎ Jupiter07:09 – 08:20
- 3♂︎ Mars08:20 – 09:30
- 4☉︎ Sun09:30 – 10:41
- 5♀︎ Venus10:41 – 11:51
- 6☿︎ Mercury11:51 – 13:02
- 7☽︎ Moon13:02 – 14:13
- 8♄︎ Saturn14:13 – 15:23
- 9♃︎ Jupiter15:23 – 16:34
- 10♂︎ Mars16:34 – 17:44
- 11☉︎ Sun17:44 – 18:55
- 12♀︎ Venus18:55 – 20:06
Night
- 1☿︎ Mercury20:06 – 20:55
- 2☽︎ Moon20:55 – 21:45
- 3♄︎ Saturn21:45 – 22:34
- 4♃︎ Jupiter22:34 – 23:24
- 5♂︎ Mars23:24 – 00:13
- 6☉︎ Sun00:13 – 01:03
- 7♀︎ Venus01:03 – 01:52
- 8☿︎ Mercury01:52 – 02:42
- 9☽︎ Moon02:42 – 03:31
- 10♄︎ Saturn03:31 – 04:21
- 11♃︎ Jupiter04:21 – 05:11
- 12♂︎ Mars05:11 – 06:00
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Saturday, 23 August 2025, the Sun rises at 05:59 and sets at 20:06: the day lasts 14h 07m, that is twelve day hours of 1h 11m. The night, until the next sunrise at 06:00, lasts 9h 55m: twelve night hours of 50 min.
Which planet rules the first hour that day?
Saturn, from 05:59 to 07:09: 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.