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 Friday, 5 December 2025: day of Venus
- Sunrise
- 08:28
- Sunset
- 15:59
- Next sunrise
- 08:30
A day hour lasts 38 min; a night hour, 1h 23m. Local time (Europe/London).
Day
- 1♀︎ Venus08:28 – 09:06
- 2☿︎ Mercury09:06 – 09:43
- 3☽︎ Moon09:43 – 10:21
- 4♄︎ Saturn10:21 – 10:59
- 5♃︎ Jupiter10:59 – 11:36
- 6♂︎ Mars11:36 – 12:14
- 7☉︎ Sun12:14 – 12:51
- 8♀︎ Venus12:51 – 13:29
- 9☿︎ Mercury13:29 – 14:07
- 10☽︎ Moon14:07 – 14:44
- 11♄︎ Saturn14:44 – 15:22
- 12♃︎ Jupiter15:22 – 15:59
Night
- 1♂︎ Mars15:59 – 17:22
- 2☉︎ Sun17:22 – 18:44
- 3♀︎ Venus18:44 – 20:07
- 4☿︎ Mercury20:07 – 21:29
- 5☽︎ Moon21:29 – 22:52
- 6♄︎ Saturn22:52 – 00:14
- 7♃︎ Jupiter00:14 – 01:37
- 8♂︎ Mars01:37 – 02:59
- 9☉︎ Sun02:59 – 04:22
- 10♀︎ Venus04:22 – 05:45
- 11☿︎ Mercury05:45 – 07:07
- 12☽︎ Moon07:07 – 08:30
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Belfast?
On Friday, 5 December 2025, the Sun rises at 08:28 and sets at 15:59: the day lasts 7h 31m, that is twelve day hours of 38 min. The night, until the next sunrise at 08:30, lasts 16h 30m: twelve night hours of 1h 23m.
Which planet rules the first hour that day?
Venus, from 08:28 to 09:06: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.