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 Tuesday, 13 January 2026: day of Mars
- Sunrise
- 08:01
- Sunset
- 16:17
- Next sunrise
- 08:00
A day hour lasts 41 min; a night hour, 1h 19m. Local time (Europe/London).
Day
- 1♂︎ Mars08:01 – 08:42
- 2☉︎ Sun08:42 – 09:23
- 3♀︎ Venus09:23 – 10:05
- 4☿︎ Mercury10:05 – 10:46
- 5☽︎ Moon10:46 – 11:28
- 6♄︎ Saturn11:28 – 12:09
- 7♃︎ Jupiter12:09 – 12:50
- 8♂︎ Mars12:50 – 13:32
- 9☉︎ Sun13:32 – 14:13
- 10♀︎ Venus14:13 – 14:54
- 11☿︎ Mercury14:54 – 15:36
- 12☽︎ Moon15:36 – 16:17
Night
- 1♄︎ Saturn16:17 – 17:36
- 2♃︎ Jupiter17:36 – 18:54
- 3♂︎ Mars18:54 – 20:13
- 4☉︎ Sun20:13 – 21:31
- 5♀︎ Venus21:31 – 22:50
- 6☿︎ Mercury22:50 – 00:09
- 7☽︎ Moon00:09 – 01:27
- 8♄︎ Saturn01:27 – 02:46
- 9♃︎ Jupiter02:46 – 04:04
- 10♂︎ Mars04:04 – 05:23
- 11☉︎ Sun05:23 – 06:41
- 12♀︎ Venus06:41 – 08:00
Other cities · United Kingdom
Questions
How are the planetary hours calculated in London?
On Tuesday, 13 January 2026, the Sun rises at 08:01 and sets at 16:17: the day lasts 8h 17m, that is twelve day hours of 41 min. The night, until the next sunrise at 08:00, lasts 15h 43m: twelve night hours of 1h 19m.
Which planet rules the first hour that day?
Mars, from 08:01 to 08:42: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.