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, 21 May 2026: day of Jupiter
- Sunrise
- 05:00
- Sunset
- 20:54
- Next sunrise
- 04:59
A day hour lasts 1h 20m; a night hour, 40 min. Local time (Europe/London).
Day
- 1♃︎ Jupiter05:00 – 06:20
- 2♂︎ Mars06:20 – 07:39
- 3☉︎ Sun07:39 – 08:59
- 4♀︎ Venus08:59 – 10:18
- 5☿︎ Mercury10:18 – 11:38
- 6☽︎ Moon11:38 – 12:57
- 7♄︎ Saturn12:57 – 14:17
- 8♃︎ Jupiter14:17 – 15:36
- 9♂︎ Mars15:36 – 16:56
- 10☉︎ Sun16:56 – 18:15
- 11♀︎ Venus18:15 – 19:35
- 12☿︎ Mercury19:35 – 20:54
Night
- 1☽︎ Moon20:54 – 21:35
- 2♄︎ Saturn21:35 – 22:15
- 3♃︎ Jupiter22:15 – 22:55
- 4♂︎ Mars22:55 – 23:36
- 5☉︎ Sun23:36 – 00:16
- 6♀︎ Venus00:16 – 00:56
- 7☿︎ Mercury00:56 – 01:37
- 8☽︎ Moon01:37 – 02:17
- 9♄︎ Saturn02:17 – 02:58
- 10♃︎ Jupiter02:58 – 03:38
- 11♂︎ Mars03:38 – 04:18
- 12☉︎ Sun04:18 – 04:59
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Thursday, 21 May 2026, the Sun rises at 05:00 and sets at 20:54: the day lasts 15h 54m, that is twelve day hours of 1h 20m. The night, until the next sunrise at 04:59, lasts 8h 05m: twelve night hours of 40 min.
Which planet rules the first hour that day?
Jupiter, from 05:00 to 06:20: 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.