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 Sunday, 4 January 2026: day of the Sun
- Sunrise
- 08:05
- Sunset
- 16:05
- Next sunrise
- 08:05
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/London).
Day
- 1☉︎ Sun08:05 – 08:45
- 2♀︎ Venus08:45 – 09:25
- 3☿︎ Mercury09:25 – 10:05
- 4☽︎ Moon10:05 – 10:45
- 5♄︎ Saturn10:45 – 11:25
- 6♃︎ Jupiter11:25 – 12:05
- 7♂︎ Mars12:05 – 12:45
- 8☉︎ Sun12:45 – 13:25
- 9♀︎ Venus13:25 – 14:05
- 10☿︎ Mercury14:05 – 14:45
- 11☽︎ Moon14:45 – 15:25
- 12♄︎ Saturn15:25 – 16:05
Night
- 1♃︎ Jupiter16:05 – 17:25
- 2♂︎ Mars17:25 – 18:45
- 3☉︎ Sun18:45 – 20:05
- 4♀︎ Venus20:05 – 21:25
- 5☿︎ Mercury21:25 – 22:45
- 6☽︎ Moon22:45 – 00:05
- 7♄︎ Saturn00:05 – 01:25
- 8♃︎ Jupiter01:25 – 02:45
- 9♂︎ Mars02:45 – 04:05
- 10☉︎ Sun04:05 – 05:25
- 11♀︎ Venus05:25 – 06:45
- 12☿︎ Mercury06:45 – 08:05
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Sunday, 4 January 2026, the Sun rises at 08:05 and sets at 16:05: the day lasts 8h 00m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:05, lasts 16h 00m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
The Sun, from 08:05 to 08:45: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.