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, 13 December 2025: day of Saturn
- Sunrise
- 07:33
- Sunset
- 15:09
- Next sunrise
- 07:34
A day hour lasts 38 min; a night hour, 1h 22m. Local time (Europe/Warsaw).
Day
- 1♄︎ Saturn07:33 – 08:11
- 2♃︎ Jupiter08:11 – 08:49
- 3♂︎ Mars08:49 – 09:27
- 4☉︎ Sun09:27 – 10:05
- 5♀︎ Venus10:05 – 10:43
- 6☿︎ Mercury10:43 – 11:21
- 7☽︎ Moon11:21 – 11:59
- 8♄︎ Saturn11:59 – 12:37
- 9♃︎ Jupiter12:37 – 13:15
- 10♂︎ Mars13:15 – 13:53
- 11☉︎ Sun13:53 – 14:31
- 12♀︎ Venus14:31 – 15:09
Night
- 1☿︎ Mercury15:09 – 16:31
- 2☽︎ Moon16:31 – 17:53
- 3♄︎ Saturn17:53 – 19:15
- 4♃︎ Jupiter19:15 – 20:37
- 5♂︎ Mars20:37 – 21:59
- 6☉︎ Sun21:59 – 23:21
- 7♀︎ Venus23:21 – 00:44
- 8☿︎ Mercury00:44 – 02:06
- 9☽︎ Moon02:06 – 03:28
- 10♄︎ Saturn03:28 – 04:50
- 11♃︎ Jupiter04:50 – 06:12
- 12♂︎ Mars06:12 – 07:34
Other cities · Poland
Questions
How are the planetary hours calculated in Białystok?
On Saturday, 13 December 2025, the Sun rises at 07:33 and sets at 15:09: the day lasts 7h 36m, that is twelve day hours of 38 min. The night, until the next sunrise at 07:34, lasts 16h 25m: twelve night hours of 1h 22m.
Which planet rules the first hour that day?
Saturn, from 07:33 to 08:11: 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.