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 Wednesday, 30 December 2026: day of Mercury
- Sunrise
- 08:06
- Sunset
- 15:59
- Next sunrise
- 08:06
A day hour lasts 39 min; a night hour, 1h 21m. Local time (Europe/London).
Day
- 1☿︎ Mercury08:06 – 08:45
- 2☽︎ Moon08:45 – 09:25
- 3♄︎ Saturn09:25 – 10:04
- 4♃︎ Jupiter10:04 – 10:44
- 5♂︎ Mars10:44 – 11:23
- 6☉︎ Sun11:23 – 12:03
- 7♀︎ Venus12:03 – 12:42
- 8☿︎ Mercury12:42 – 13:22
- 9☽︎ Moon13:22 – 14:01
- 10♄︎ Saturn14:01 – 14:40
- 11♃︎ Jupiter14:40 – 15:20
- 12♂︎ Mars15:20 – 15:59
Night
- 1☉︎ Sun15:59 – 17:20
- 2♀︎ Venus17:20 – 18:40
- 3☿︎ Mercury18:40 – 20:01
- 4☽︎ Moon20:01 – 21:22
- 5♄︎ Saturn21:22 – 22:42
- 6♃︎ Jupiter22:42 – 00:03
- 7♂︎ Mars00:03 – 01:23
- 8☉︎ Sun01:23 – 02:44
- 9♀︎ Venus02:44 – 04:04
- 10☿︎ Mercury04:04 – 05:25
- 11☽︎ Moon05:25 – 06:45
- 12♄︎ Saturn06:45 – 08:06
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Wednesday, 30 December 2026, the Sun rises at 08:06 and sets at 15:59: the day lasts 7h 54m, that is twelve day hours of 39 min. The night, until the next sunrise at 08:06, lasts 16h 06m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
Mercury, from 08:06 to 08:45: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.