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 Thursday, 8 January 2026: day of Jupiter
- Sunrise
- 08:04
- Sunset
- 16:10
- Next sunrise
- 08:03
A day hour lasts 41 min; a night hour, 1h 19m. Local time (Europe/London).
Day
- 1♃︎ Jupiter08:04 – 08:44
- 2♂︎ Mars08:44 – 09:25
- 3☉︎ Sun09:25 – 10:05
- 4♀︎ Venus10:05 – 10:46
- 5☿︎ Mercury10:46 – 11:26
- 6☽︎ Moon11:26 – 12:07
- 7♄︎ Saturn12:07 – 12:47
- 8♃︎ Jupiter12:47 – 13:28
- 9♂︎ Mars13:28 – 14:09
- 10☉︎ Sun14:09 – 14:49
- 11♀︎ Venus14:49 – 15:30
- 12☿︎ Mercury15:30 – 16:10
Night
- 1☽︎ Moon16:10 – 17:30
- 2♄︎ Saturn17:30 – 18:49
- 3♃︎ Jupiter18:49 – 20:08
- 4♂︎ Mars20:08 – 21:28
- 5☉︎ Sun21:28 – 22:47
- 6♀︎ Venus22:47 – 00:07
- 7☿︎ Mercury00:07 – 01:26
- 8☽︎ Moon01:26 – 02:45
- 9♄︎ Saturn02:45 – 04:05
- 10♃︎ Jupiter04:05 – 05:24
- 11♂︎ Mars05:24 – 06:44
- 12☉︎ Sun06:44 – 08:03
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Thursday, 8 January 2026, the Sun rises at 08:04 and sets at 16:10: the day lasts 8h 07m, that is twelve day hours of 41 min. The night, until the next sunrise at 08:03, lasts 15h 53m: twelve night hours of 1h 19m.
Which planet rules the first hour that day?
Jupiter, 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: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.