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, 18 December 2026: day of Venus
- Sunrise
- 08:42
- Sunset
- 15:58
- Next sunrise
- 08:43
A day hour lasts 36 min; a night hour, 1h 24m. Local time (Europe/London).
Day
- 1♀︎ Venus08:42 – 09:18
- 2☿︎ Mercury09:18 – 09:55
- 3☽︎ Moon09:55 – 10:31
- 4♄︎ Saturn10:31 – 11:07
- 5♃︎ Jupiter11:07 – 11:43
- 6♂︎ Mars11:43 – 12:20
- 7☉︎ Sun12:20 – 12:56
- 8♀︎ Venus12:56 – 13:32
- 9☿︎ Mercury13:32 – 14:09
- 10☽︎ Moon14:09 – 14:45
- 11♄︎ Saturn14:45 – 15:21
- 12♃︎ Jupiter15:21 – 15:58
Night
- 1♂︎ Mars15:58 – 17:21
- 2☉︎ Sun17:21 – 18:45
- 3♀︎ Venus18:45 – 20:09
- 4☿︎ Mercury20:09 – 21:33
- 5☽︎ Moon21:33 – 22:56
- 6♄︎ Saturn22:56 – 00:20
- 7♃︎ Jupiter00:20 – 01:44
- 8♂︎ Mars01:44 – 03:08
- 9☉︎ Sun03:08 – 04:31
- 10♀︎ Venus04:31 – 05:55
- 11☿︎ Mercury05:55 – 07:19
- 12☽︎ Moon07:19 – 08:43
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Belfast?
On Friday, 18 December 2026, the Sun rises at 08:42 and sets at 15:58: the day lasts 7h 16m, that is twelve day hours of 36 min. The night, until the next sunrise at 08:43, lasts 16h 45m: twelve night hours of 1h 24m.
Which planet rules the first hour that day?
Venus, from 08:42 to 09:18: 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.