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, 12 August 2025: day of Mars
- Sunrise
- 05:51
- Sunset
- 20:38
- Next sunrise
- 05:53
A day hour lasts 1h 14m; a night hour, 46 min. Local time (Europe/London).
Day
- 1♂︎ Mars05:51 – 07:05
- 2☉︎ Sun07:05 – 08:19
- 3♀︎ Venus08:19 – 09:33
- 4☿︎ Mercury09:33 – 10:47
- 5☽︎ Moon10:47 – 12:00
- 6♄︎ Saturn12:00 – 13:14
- 7♃︎ Jupiter13:14 – 14:28
- 8♂︎ Mars14:28 – 15:42
- 9☉︎ Sun15:42 – 16:56
- 10♀︎ Venus16:56 – 18:10
- 11☿︎ Mercury18:10 – 19:24
- 12☽︎ Moon19:24 – 20:38
Night
- 1♄︎ Saturn20:38 – 21:24
- 2♃︎ Jupiter21:24 – 22:10
- 3♂︎ Mars22:10 – 22:56
- 4☉︎ Sun22:56 – 23:43
- 5♀︎ Venus23:43 – 00:29
- 6☿︎ Mercury00:29 – 01:15
- 7☽︎ Moon01:15 – 02:01
- 8♄︎ Saturn02:01 – 02:48
- 9♃︎ Jupiter02:48 – 03:34
- 10♂︎ Mars03:34 – 04:20
- 11☉︎ Sun04:20 – 05:06
- 12♀︎ Venus05:06 – 05:53
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Bristol?
On Tuesday, 12 August 2025, the Sun rises at 05:51 and sets at 20:38: the day lasts 14h 47m, that is twelve day hours of 1h 14m. The night, until the next sunrise at 05:53, lasts 9h 15m: twelve night hours of 46 min.
Which planet rules the first hour that day?
Mars, from 05:51 to 07:05: 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.