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 Thursday, 11 December 2025: day of Jupiter
- Sunrise
- 08:36
- Sunset
- 15:57
- Next sunrise
- 08:37
A day hour lasts 37 min; a night hour, 1h 23m. Local time (Europe/London).
Day
- 1♃︎ Jupiter08:36 – 09:12
- 2♂︎ Mars09:12 – 09:49
- 3☉︎ Sun09:49 – 10:26
- 4♀︎ Venus10:26 – 11:03
- 5☿︎ Mercury11:03 – 11:40
- 6☽︎ Moon11:40 – 12:16
- 7♄︎ Saturn12:16 – 12:53
- 8♃︎ Jupiter12:53 – 13:30
- 9♂︎ Mars13:30 – 14:07
- 10☉︎ Sun14:07 – 14:44
- 11♀︎ Venus14:44 – 15:20
- 12☿︎ Mercury15:20 – 15:57
Night
- 1☽︎ Moon15:57 – 17:21
- 2♄︎ Saturn17:21 – 18:44
- 3♃︎ Jupiter18:44 – 20:07
- 4♂︎ Mars20:07 – 21:30
- 5☉︎ Sun21:30 – 22:54
- 6♀︎ Venus22:54 – 00:17
- 7☿︎ Mercury00:17 – 01:40
- 8☽︎ Moon01:40 – 03:04
- 9♄︎ Saturn03:04 – 04:27
- 10♃︎ Jupiter04:27 – 05:50
- 11♂︎ Mars05:50 – 07:13
- 12☉︎ Sun07:13 – 08:37
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Belfast?
On Thursday, 11 December 2025, the Sun rises at 08:36 and sets at 15:57: the day lasts 7h 22m, that is twelve day hours of 37 min. The night, until the next sunrise at 08:37, lasts 16h 40m: twelve night hours of 1h 23m.
Which planet rules the first hour that day?
Jupiter, from 08:36 to 09:12: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mars, the Sun, Venus, Mercury, the Moon, Saturn, then Jupiter 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.