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 Wednesday, 24 December 2025: day of Mercury
- Sunrise
- 08:45
- Sunset
- 16:01
- Next sunrise
- 08:45
A day hour lasts 36 min; a night hour, 1h 24m. Local time (Europe/London).
Day
- 1☿︎ Mercury08:45 – 09:21
- 2☽︎ Moon09:21 – 09:58
- 3♄︎ Saturn09:58 – 10:34
- 4♃︎ Jupiter10:34 – 11:10
- 5♂︎ Mars11:10 – 11:47
- 6☉︎ Sun11:47 – 12:23
- 7♀︎ Venus12:23 – 12:59
- 8☿︎ Mercury12:59 – 13:36
- 9☽︎ Moon13:36 – 14:12
- 10♄︎ Saturn14:12 – 14:48
- 11♃︎ Jupiter14:48 – 15:24
- 12♂︎ Mars15:24 – 16:01
Night
- 1☉︎ Sun16:01 – 17:24
- 2♀︎ Venus17:24 – 18:48
- 3☿︎ Mercury18:48 – 20:12
- 4☽︎ Moon20:12 – 21:36
- 5♄︎ Saturn21:36 – 22:59
- 6♃︎ Jupiter22:59 – 00:23
- 7♂︎ Mars00:23 – 01:47
- 8☉︎ Sun01:47 – 03:11
- 9♀︎ Venus03:11 – 04:34
- 10☿︎ Mercury04:34 – 05:58
- 11☽︎ Moon05:58 – 07:22
- 12♄︎ Saturn07:22 – 08:45
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Belfast?
On Wednesday, 24 December 2025, the Sun rises at 08:45 and sets at 16:01: the day lasts 7h 16m, that is twelve day hours of 36 min. The night, until the next sunrise at 08:45, lasts 16h 45m: twelve night hours of 1h 24m.
Which planet rules the first hour that day?
Mercury, from 08:45 to 09:21: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.