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, 16 December 2026: day of Mercury
- Sunrise
- 08:00
- Sunset
- 15:51
- Next sunrise
- 08:01
A day hour lasts 39 min; a night hour, 1h 21m. Local time (Europe/London).
Day
- 1☿︎ Mercury08:00 – 08:39
- 2☽︎ Moon08:39 – 09:18
- 3♄︎ Saturn09:18 – 09:58
- 4♃︎ Jupiter09:58 – 10:37
- 5♂︎ Mars10:37 – 11:16
- 6☉︎ Sun11:16 – 11:56
- 7♀︎ Venus11:56 – 12:35
- 8☿︎ Mercury12:35 – 13:14
- 9☽︎ Moon13:14 – 13:53
- 10♄︎ Saturn13:53 – 14:33
- 11♃︎ Jupiter14:33 – 15:12
- 12♂︎ Mars15:12 – 15:51
Night
- 1☉︎ Sun15:51 – 17:12
- 2♀︎ Venus17:12 – 18:33
- 3☿︎ Mercury18:33 – 19:54
- 4☽︎ Moon19:54 – 21:14
- 5♄︎ Saturn21:14 – 22:35
- 6♃︎ Jupiter22:35 – 23:56
- 7♂︎ Mars23:56 – 01:17
- 8☉︎ Sun01:17 – 02:38
- 9♀︎ Venus02:38 – 03:58
- 10☿︎ Mercury03:58 – 05:19
- 11☽︎ Moon05:19 – 06:40
- 12♄︎ Saturn06:40 – 08:01
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Wednesday, 16 December 2026, the Sun rises at 08:00 and sets at 15:51: the day lasts 7h 51m, that is twelve day hours of 39 min. The night, until the next sunrise at 08:01, lasts 16h 10m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
Mercury, from 08:00 to 08:39: 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.