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 Friday, 8 August 2025: day of Venus
- Sunrise
- 05:35
- Sunset
- 20:35
- Next sunrise
- 05:36
A day hour lasts 1h 15m; a night hour, 45 min. Local time (Europe/London).
Day
- 1♀︎ Venus05:35 – 06:50
- 2☿︎ Mercury06:50 – 08:05
- 3☽︎ Moon08:05 – 09:20
- 4♄︎ Saturn09:20 – 10:35
- 5♃︎ Jupiter10:35 – 11:50
- 6♂︎ Mars11:50 – 13:05
- 7☉︎ Sun13:05 – 14:20
- 8♀︎ Venus14:20 – 15:35
- 9☿︎ Mercury15:35 – 16:50
- 10☽︎ Moon16:50 – 18:05
- 11♄︎ Saturn18:05 – 19:20
- 12♃︎ Jupiter19:20 – 20:35
Night
- 1♂︎ Mars20:35 – 21:21
- 2☉︎ Sun21:21 – 22:06
- 3♀︎ Venus22:06 – 22:51
- 4☿︎ Mercury22:51 – 23:36
- 5☽︎ Moon23:36 – 00:21
- 6♄︎ Saturn00:21 – 01:06
- 7♃︎ Jupiter01:06 – 01:51
- 8♂︎ Mars01:51 – 02:36
- 9☉︎ Sun02:36 – 03:21
- 10♀︎ Venus03:21 – 04:06
- 11☿︎ Mercury04:06 – 04:51
- 12☽︎ Moon04:51 – 05:36
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Friday, 8 August 2025, the Sun rises at 05:35 and sets at 20:35: the day lasts 15h 01m, that is twelve day hours of 1h 15m. The night, until the next sunrise at 05:36, lasts 9h 01m: twelve night hours of 45 min.
Which planet rules the first hour that day?
Venus, from 05:35 to 06:50: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.