Planetary hours
in Białystok.
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 Saturday, 20 December 2025: day of Saturn
- Sunrise
- 07:38
- Sunset
- 15:11
- Next sunrise
- 07:39
A day hour lasts 38 min; a night hour, 1h 22m. Local time (Europe/Warsaw).
Day
- 1♄︎ Saturn07:38 – 08:16
- 2♃︎ Jupiter08:16 – 08:54
- 3♂︎ Mars08:54 – 09:31
- 4☉︎ Sun09:31 – 10:09
- 5♀︎ Venus10:09 – 10:47
- 6☿︎ Mercury10:47 – 11:25
- 7☽︎ Moon11:25 – 12:02
- 8♄︎ Saturn12:02 – 12:40
- 9♃︎ Jupiter12:40 – 13:18
- 10♂︎ Mars13:18 – 13:55
- 11☉︎ Sun13:55 – 14:33
- 12♀︎ Venus14:33 – 15:11
Night
- 1☿︎ Mercury15:11 – 16:33
- 2☽︎ Moon16:33 – 17:55
- 3♄︎ Saturn17:55 – 19:18
- 4♃︎ Jupiter19:18 – 20:40
- 5♂︎ Mars20:40 – 22:02
- 6☉︎ Sun22:02 – 23:25
- 7♀︎ Venus23:25 – 00:47
- 8☿︎ Mercury00:47 – 02:09
- 9☽︎ Moon02:09 – 03:32
- 10♄︎ Saturn03:32 – 04:54
- 11♃︎ Jupiter04:54 – 06:16
- 12♂︎ Mars06:16 – 07:39
Other cities · Poland
Questions
How are the planetary hours calculated in Białystok?
On Saturday, 20 December 2025, the Sun rises at 07:38 and sets at 15:11: the day lasts 7h 32m, that is twelve day hours of 38 min. The night, until the next sunrise at 07:39, lasts 16h 28m: twelve night hours of 1h 22m.
Which planet rules the first hour that day?
Saturn, from 07:38 to 08:16: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn 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.