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, 16 September 2026: day of Mercury
- Sunrise
- 06:36
- Sunset
- 19:12
- Next sunrise
- 06:38
A day hour lasts 1h 03m; a night hour, 57 min. Local time (Europe/London).
Day
- 1☿︎ Mercury06:36 – 07:39
- 2☽︎ Moon07:39 – 08:42
- 3♄︎ Saturn08:42 – 09:45
- 4♃︎ Jupiter09:45 – 10:48
- 5♂︎ Mars10:48 – 11:51
- 6☉︎ Sun11:51 – 12:54
- 7♀︎ Venus12:54 – 13:57
- 8☿︎ Mercury13:57 – 15:00
- 9☽︎ Moon15:00 – 16:03
- 10♄︎ Saturn16:03 – 17:06
- 11♃︎ Jupiter17:06 – 18:09
- 12♂︎ Mars18:09 – 19:12
Night
- 1☉︎ Sun19:12 – 20:09
- 2♀︎ Venus20:09 – 21:07
- 3☿︎ Mercury21:07 – 22:04
- 4☽︎ Moon22:04 – 23:01
- 5♄︎ Saturn23:01 – 23:58
- 6♃︎ Jupiter23:58 – 00:55
- 7♂︎ Mars00:55 – 01:52
- 8☉︎ Sun01:52 – 02:49
- 9♀︎ Venus02:49 – 03:47
- 10☿︎ Mercury03:47 – 04:44
- 11☽︎ Moon04:44 – 05:41
- 12♄︎ Saturn05:41 – 06:38
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Wednesday, 16 September 2026, the Sun rises at 06:36 and sets at 19:12: the day lasts 12h 36m, that is twelve day hours of 1h 03m. The night, until the next sunrise at 06:38, lasts 11h 26m: twelve night hours of 57 min.
Which planet rules the first hour that day?
Mercury, from 06:36 to 07:39: 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.