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 Friday, 12 December 2025: day of Venus
- Sunrise
- 08:06
- Sunset
- 16:01
- Next sunrise
- 08:07
A day hour lasts 40 min; a night hour, 1h 21m. Local time (Europe/London).
Day
- 1♀︎ Venus08:06 – 08:46
- 2☿︎ Mercury08:46 – 09:25
- 3☽︎ Moon09:25 – 10:05
- 4♄︎ Saturn10:05 – 10:45
- 5♃︎ Jupiter10:45 – 11:24
- 6♂︎ Mars11:24 – 12:04
- 7☉︎ Sun12:04 – 12:43
- 8♀︎ Venus12:43 – 13:23
- 9☿︎ Mercury13:23 – 14:02
- 10☽︎ Moon14:02 – 14:42
- 11♄︎ Saturn14:42 – 15:21
- 12♃︎ Jupiter15:21 – 16:01
Night
- 1♂︎ Mars16:01 – 17:21
- 2☉︎ Sun17:21 – 18:42
- 3♀︎ Venus18:42 – 20:03
- 4☿︎ Mercury20:03 – 21:23
- 5☽︎ Moon21:23 – 22:44
- 6♄︎ Saturn22:44 – 00:04
- 7♃︎ Jupiter00:04 – 01:25
- 8♂︎ Mars01:25 – 02:45
- 9☉︎ Sun02:45 – 04:06
- 10♀︎ Venus04:06 – 05:26
- 11☿︎ Mercury05:26 – 06:47
- 12☽︎ Moon06:47 – 08:07
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Bristol?
On Friday, 12 December 2025, the Sun rises at 08:06 and sets at 16:01: the day lasts 7h 55m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:07, lasts 16h 06m: twelve night hours of 1h 21m.
Which planet rules the first hour that day?
Venus, from 08:06 to 08:46: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.