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 Thursday, 25 December 2025: day of Jupiter
- Sunrise
- 08:05
- Sunset
- 15:55
- Next sunrise
- 08:05
A day hour lasts 39 min; a night hour, 1h 21m. Local time (Europe/London).
Day
- 1♃︎ Jupiter08:05 – 08:44
- 2♂︎ Mars08:44 – 09:23
- 3☉︎ Sun09:23 – 10:03
- 4♀︎ Venus10:03 – 10:42
- 5☿︎ Mercury10:42 – 11:21
- 6☽︎ Moon11:21 – 12:00
- 7♄︎ Saturn12:00 – 12:39
- 8♃︎ Jupiter12:39 – 13:19
- 9♂︎ Mars13:19 – 13:58
- 10☉︎ Sun13:58 – 14:37
- 11♀︎ Venus14:37 – 15:16
- 12☿︎ Mercury15:16 – 15:55
Night
- 1☽︎ Moon15:55 – 17:16
- 2♄︎ Saturn17:16 – 18:37
- 3♃︎ Jupiter18:37 – 19:58
- 4♂︎ Mars19:58 – 21:19
- 5☉︎ Sun21:19 – 22:40
- 6♀︎ Venus22:40 – 00:00
- 7☿︎ Mercury00:00 – 01:21
- 8☽︎ Moon01:21 – 02:42
- 9♄︎ Saturn02:42 – 04:03
- 10♃︎ Jupiter04:03 – 05:24
- 11♂︎ Mars05:24 – 06:44
- 12☉︎ Sun06:44 – 08:05
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Thursday, 25 December 2025, the Sun rises at 08:05 and sets at 15:55: the day lasts 7h 50m, that is twelve day hours of 39 min. The night, until the next sunrise at 08:05, lasts 16h 10m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
Jupiter, from 08:05 to 08:44: 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.