Planetary hours
in Belfast.
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 Saturday, 6 December 2025: day of Saturn
- Sunrise
- 08:30
- Sunset
- 15:59
- Next sunrise
- 08:31
A day hour lasts 37 min; a night hour, 1h 23m. Local time (Europe/London).
Day
- 1♄︎ Saturn08:30 – 09:07
- 2♃︎ Jupiter09:07 – 09:44
- 3♂︎ Mars09:44 – 10:22
- 4☉︎ Sun10:22 – 10:59
- 5♀︎ Venus10:59 – 11:37
- 6☿︎ Mercury11:37 – 12:14
- 7☽︎ Moon12:14 – 12:52
- 8♄︎ Saturn12:52 – 13:29
- 9♃︎ Jupiter13:29 – 14:07
- 10♂︎ Mars14:07 – 14:44
- 11☉︎ Sun14:44 – 15:21
- 12♀︎ Venus15:21 – 15:59
Night
- 1☿︎ Mercury15:59 – 17:22
- 2☽︎ Moon17:22 – 18:44
- 3♄︎ Saturn18:44 – 20:07
- 4♃︎ Jupiter20:07 – 21:30
- 5♂︎ Mars21:30 – 22:52
- 6☉︎ Sun22:52 – 00:15
- 7♀︎ Venus00:15 – 01:38
- 8☿︎ Mercury01:38 – 03:00
- 9☽︎ Moon03:00 – 04:23
- 10♄︎ Saturn04:23 – 05:46
- 11♃︎ Jupiter05:46 – 07:08
- 12♂︎ Mars07:08 – 08:31
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Belfast?
On Saturday, 6 December 2025, the Sun rises at 08:30 and sets at 15:59: the day lasts 7h 29m, that is twelve day hours of 37 min. The night, until the next sunrise at 08:31, lasts 16h 32m: twelve night hours of 1h 23m.
Which planet rules the first hour that day?
Saturn, from 08:30 to 09:07: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.