Planetary hours
in Bristol.
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 Monday, 15 December 2025: day of the Moon
- Sunrise
- 08:09
- Sunset
- 16:01
- Next sunrise
- 08:10
A day hour lasts 39 min; a night hour, 1h 21m. Local time (Europe/London).
Day
- 1☽︎ Moon08:09 – 08:48
- 2♄︎ Saturn08:48 – 09:28
- 3♃︎ Jupiter09:28 – 10:07
- 4♂︎ Mars10:07 – 10:46
- 5☉︎ Sun10:46 – 11:26
- 6♀︎ Venus11:26 – 12:05
- 7☿︎ Mercury12:05 – 12:44
- 8☽︎ Moon12:44 – 13:24
- 9♄︎ Saturn13:24 – 14:03
- 10♃︎ Jupiter14:03 – 14:42
- 11♂︎ Mars14:42 – 15:22
- 12☉︎ Sun15:22 – 16:01
Night
- 1♀︎ Venus16:01 – 17:22
- 2☿︎ Mercury17:22 – 18:43
- 3☽︎ Moon18:43 – 20:03
- 4♄︎ Saturn20:03 – 21:24
- 5♃︎ Jupiter21:24 – 22:45
- 6♂︎ Mars22:45 – 00:05
- 7☉︎ Sun00:05 – 01:26
- 8♀︎ Venus01:26 – 02:47
- 9☿︎ Mercury02:47 – 04:08
- 10☽︎ Moon04:08 – 05:28
- 11♄︎ Saturn05:28 – 06:49
- 12♃︎ Jupiter06:49 – 08:10
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Bristol?
On Monday, 15 December 2025, the Sun rises at 08:09 and sets at 16:01: the day lasts 7h 52m, that is twelve day hours of 39 min. The night, until the next sunrise at 08:10, lasts 16h 09m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
The Moon, from 08:09 to 08:48: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Saturn, Jupiter, Mars, the Sun, Venus, Mercury, then the Moon 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.