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 Tuesday, 16 December 2025: day of Mars
- Sunrise
- 08:41
- Sunset
- 15:57
- Next sunrise
- 08:41
A day hour lasts 36 min; a night hour, 1h 24m. Local time (Europe/London).
Day
- 1♂︎ Mars08:41 – 09:17
- 2☉︎ Sun09:17 – 09:53
- 3♀︎ Venus09:53 – 10:30
- 4☿︎ Mercury10:30 – 11:06
- 5☽︎ Moon11:06 – 11:43
- 6♄︎ Saturn11:43 – 12:19
- 7♃︎ Jupiter12:19 – 12:55
- 8♂︎ Mars12:55 – 13:32
- 9☉︎ Sun13:32 – 14:08
- 10♀︎ Venus14:08 – 14:44
- 11☿︎ Mercury14:44 – 15:21
- 12☽︎ Moon15:21 – 15:57
Night
- 1♄︎ Saturn15:57 – 17:21
- 2♃︎ Jupiter17:21 – 18:45
- 3♂︎ Mars18:45 – 20:08
- 4☉︎ Sun20:08 – 21:32
- 5♀︎ Venus21:32 – 22:56
- 6☿︎ Mercury22:56 – 00:19
- 7☽︎ Moon00:19 – 01:43
- 8♄︎ Saturn01:43 – 03:07
- 9♃︎ Jupiter03:07 – 04:30
- 10♂︎ Mars04:30 – 05:54
- 11☉︎ Sun05:54 – 07:18
- 12♀︎ Venus07:18 – 08:41
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Belfast?
On Tuesday, 16 December 2025, the Sun rises at 08:41 and sets at 15:57: the day lasts 7h 17m, that is twelve day hours of 36 min. The night, until the next sunrise at 08:41, lasts 16h 44m: twelve night hours of 1h 24m.
Which planet rules the first hour that day?
Mars, from 08:41 to 09:17: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.