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 Wednesday, 19 August 2026: day of Mercury
- Sunrise
- 05:52
- Sunset
- 20:14
- Next sunrise
- 05:53
A day hour lasts 1h 12m; a night hour, 48 min. Local time (Europe/London).
Day
- 1☿︎ Mercury05:52 – 07:04
- 2☽︎ Moon07:04 – 08:16
- 3♄︎ Saturn08:16 – 09:27
- 4♃︎ Jupiter09:27 – 10:39
- 5♂︎ Mars10:39 – 11:51
- 6☉︎ Sun11:51 – 13:03
- 7♀︎ Venus13:03 – 14:15
- 8☿︎ Mercury14:15 – 15:27
- 9☽︎ Moon15:27 – 16:39
- 10♄︎ Saturn16:39 – 17:51
- 11♃︎ Jupiter17:51 – 19:03
- 12♂︎ Mars19:03 – 20:14
Night
- 1☉︎ Sun20:14 – 21:03
- 2♀︎ Venus21:03 – 21:51
- 3☿︎ Mercury21:51 – 22:39
- 4☽︎ Moon22:39 – 23:27
- 5♄︎ Saturn23:27 – 00:16
- 6♃︎ Jupiter00:16 – 01:04
- 7♂︎ Mars01:04 – 01:52
- 8☉︎ Sun01:52 – 02:40
- 9♀︎ Venus02:40 – 03:29
- 10☿︎ Mercury03:29 – 04:17
- 11☽︎ Moon04:17 – 05:05
- 12♄︎ Saturn05:05 – 05:53
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Wednesday, 19 August 2026, the Sun rises at 05:52 and sets at 20:14: the day lasts 14h 23m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 05:53, lasts 9h 39m: twelve night hours of 48 min.
Which planet rules the first hour that day?
Mercury, from 05:52 to 07:04: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.