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 Tuesday, 9 December 2025: day of Mars
- Sunrise
- 08:03
- Sunset
- 16:01
- Next sunrise
- 08:04
A day hour lasts 40 min; a night hour, 1h 20m. Local time (Europe/London).
Day
- 1♂︎ Mars08:03 – 08:43
- 2☉︎ Sun08:43 – 09:23
- 3♀︎ Venus09:23 – 10:03
- 4☿︎ Mercury10:03 – 10:43
- 5☽︎ Moon10:43 – 11:22
- 6♄︎ Saturn11:22 – 12:02
- 7♃︎ Jupiter12:02 – 12:42
- 8♂︎ Mars12:42 – 13:22
- 9☉︎ Sun13:22 – 14:02
- 10♀︎ Venus14:02 – 14:42
- 11☿︎ Mercury14:42 – 15:21
- 12☽︎ Moon15:21 – 16:01
Night
- 1♄︎ Saturn16:01 – 17:21
- 2♃︎ Jupiter17:21 – 18:42
- 3♂︎ Mars18:42 – 20:02
- 4☉︎ Sun20:02 – 21:22
- 5♀︎ Venus21:22 – 22:43
- 6☿︎ Mercury22:43 – 00:03
- 7☽︎ Moon00:03 – 01:23
- 8♄︎ Saturn01:23 – 02:43
- 9♃︎ Jupiter02:43 – 04:04
- 10♂︎ Mars04:04 – 05:24
- 11☉︎ Sun05:24 – 06:44
- 12♀︎ Venus06:44 – 08:04
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Bristol?
On Tuesday, 9 December 2025, the Sun rises at 08:03 and sets at 16:01: the day lasts 7h 58m, that is twelve day hours of 40 min. The night, until the next sunrise at 08:04, lasts 16h 03m: twelve night hours of 1h 20m.
Which planet rules the first hour that day?
Mars, from 08:03 to 08:43: 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.