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, 7 January 2026: day of Mercury
- Sunrise
- 08:04
- Sunset
- 16:09
- Next sunrise
- 08:04
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/London).
Day
- 1☿︎ Mercury08:04 – 08:44
- 2☽︎ Moon08:44 – 09:25
- 3♄︎ Saturn09:25 – 10:05
- 4♃︎ Jupiter10:05 – 10:46
- 5♂︎ Mars10:46 – 11:26
- 6☉︎ Sun11:26 – 12:06
- 7♀︎ Venus12:06 – 12:47
- 8☿︎ Mercury12:47 – 13:27
- 9☽︎ Moon13:27 – 14:08
- 10♄︎ Saturn14:08 – 14:48
- 11♃︎ Jupiter14:48 – 15:28
- 12♂︎ Mars15:28 – 16:09
Night
- 1☉︎ Sun16:09 – 17:28
- 2♀︎ Venus17:28 – 18:48
- 3☿︎ Mercury18:48 – 20:08
- 4☽︎ Moon20:08 – 21:27
- 5♄︎ Saturn21:27 – 22:47
- 6♃︎ Jupiter22:47 – 00:06
- 7♂︎ Mars00:06 – 01:26
- 8☉︎ Sun01:26 – 02:45
- 9♀︎ Venus02:45 – 04:05
- 10☿︎ Mercury04:05 – 05:24
- 11☽︎ Moon05:24 – 06:44
- 12♄︎ Saturn06:44 – 08:04
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Wednesday, 7 January 2026, the Sun rises at 08:04 and sets at 16:09: the day lasts 8h 05m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:04, lasts 15h 55m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
Mercury, from 08:04 to 08:44: 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.