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 Tuesday, 8 December 2026: day of Mars
- Sunrise
- 07:52
- Sunset
- 15:51
- Next sunrise
- 07:53
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/London).
Day
- 1♂︎ Mars07:52 – 08:32
- 2☉︎ Sun08:32 – 09:12
- 3♀︎ Venus09:12 – 09:52
- 4☿︎ Mercury09:52 – 10:32
- 5☽︎ Moon10:32 – 11:12
- 6♄︎ Saturn11:12 – 11:52
- 7♃︎ Jupiter11:52 – 12:32
- 8♂︎ Mars12:32 – 13:12
- 9☉︎ Sun13:12 – 13:52
- 10♀︎ Venus13:52 – 14:32
- 11☿︎ Mercury14:32 – 15:11
- 12☽︎ Moon15:11 – 15:51
Night
- 1♄︎ Saturn15:51 – 17:12
- 2♃︎ Jupiter17:12 – 18:32
- 3♂︎ Mars18:32 – 19:52
- 4☉︎ Sun19:52 – 21:12
- 5♀︎ Venus21:12 – 22:32
- 6☿︎ Mercury22:32 – 23:52
- 7☽︎ Moon23:52 – 01:13
- 8♄︎ Saturn01:13 – 02:33
- 9♃︎ Jupiter02:33 – 03:53
- 10♂︎ Mars03:53 – 05:13
- 11☉︎ Sun05:13 – 06:33
- 12♀︎ Venus06:33 – 07:53
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Tuesday, 8 December 2026, the Sun rises at 07:52 and sets at 15:51: the day lasts 7h 59m, that is twelve day hours of 40 min. The night, until the next sunrise at 07:53, lasts 16h 02m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
Mars, from 07:52 to 08:32: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.