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, 23 December 2025: day of Mars
- Sunrise
- 08:45
- Sunset
- 16:00
- Next sunrise
- 08:45
A day hour lasts 36 min; a night hour, 1h 24m. Local time (Europe/London).
Day
- 1♂︎ Mars08:45 – 09:21
- 2☉︎ Sun09:21 – 09:57
- 3♀︎ Venus09:57 – 10:34
- 4☿︎ Mercury10:34 – 11:10
- 5☽︎ Moon11:10 – 11:46
- 6♄︎ Saturn11:46 – 12:22
- 7♃︎ Jupiter12:22 – 12:59
- 8♂︎ Mars12:59 – 13:35
- 9☉︎ Sun13:35 – 14:11
- 10♀︎ Venus14:11 – 14:48
- 11☿︎ Mercury14:48 – 15:24
- 12☽︎ Moon15:24 – 16:00
Night
- 1♄︎ Saturn16:00 – 17:24
- 2♃︎ Jupiter17:24 – 18:48
- 3♂︎ Mars18:48 – 20:11
- 4☉︎ Sun20:11 – 21:35
- 5♀︎ Venus21:35 – 22:59
- 6☿︎ Mercury22:59 – 00:23
- 7☽︎ Moon00:23 – 01:46
- 8♄︎ Saturn01:46 – 03:10
- 9♃︎ Jupiter03:10 – 04:34
- 10♂︎ Mars04:34 – 05:58
- 11☉︎ Sun05:58 – 07:21
- 12♀︎ Venus07:21 – 08:45
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Belfast?
On Tuesday, 23 December 2025, the Sun rises at 08:45 and sets at 16:00: the day lasts 7h 15m, 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?
Mars, 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 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.