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 Saturday, 18 July 2026: day of Saturn
- Sunrise
- 05:04
- Sunset
- 21:08
- Next sunrise
- 05:05
A day hour lasts 1h 20m; a night hour, 40 min. Local time (Europe/London).
Day
- 1♄︎ Saturn05:04 – 06:24
- 2♃︎ Jupiter06:24 – 07:45
- 3♂︎ Mars07:45 – 09:05
- 4☉︎ Sun09:05 – 10:25
- 5♀︎ Venus10:25 – 11:46
- 6☿︎ Mercury11:46 – 13:06
- 7☽︎ Moon13:06 – 14:26
- 8♄︎ Saturn14:26 – 15:47
- 9♃︎ Jupiter15:47 – 17:07
- 10♂︎ Mars17:07 – 18:27
- 11☉︎ Sun18:27 – 19:47
- 12♀︎ Venus19:47 – 21:08
Night
- 1☿︎ Mercury21:08 – 21:48
- 2☽︎ Moon21:48 – 22:27
- 3♄︎ Saturn22:27 – 23:07
- 4♃︎ Jupiter23:07 – 23:47
- 5♂︎ Mars23:47 – 00:27
- 6☉︎ Sun00:27 – 01:07
- 7♀︎ Venus01:07 – 01:46
- 8☿︎ Mercury01:46 – 02:26
- 9☽︎ Moon02:26 – 03:06
- 10♄︎ Saturn03:06 – 03:46
- 11♃︎ Jupiter03:46 – 04:26
- 12♂︎ Mars04:26 – 05:05
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Saturday, 18 July 2026, the Sun rises at 05:04 and sets at 21:08: the day lasts 16h 04m, that is twelve day hours of 1h 20m. The night, until the next sunrise at 05:05, lasts 7h 58m: twelve night hours of 40 min.
Which planet rules the first hour that day?
Saturn, from 05:04 to 06:24: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.