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 Wednesday, 31 December 2025: day of Mercury
- Sunrise
- 07:41
- Sunset
- 15:19
- Next sunrise
- 07:41
A day hour lasts 38 min; a night hour, 1h 22m. Local time (Europe/Warsaw).
Day
- 1☿︎ Mercury07:41 – 08:19
- 2☽︎ Moon08:19 – 08:57
- 3♄︎ Saturn08:57 – 09:36
- 4♃︎ Jupiter09:36 – 10:14
- 5♂︎ Mars10:14 – 10:52
- 6☉︎ Sun10:52 – 11:30
- 7♀︎ Venus11:30 – 12:08
- 8☿︎ Mercury12:08 – 12:46
- 9☽︎ Moon12:46 – 13:25
- 10♄︎ Saturn13:25 – 14:03
- 11♃︎ Jupiter14:03 – 14:41
- 12♂︎ Mars14:41 – 15:19
Night
- 1☉︎ Sun15:19 – 16:41
- 2♀︎ Venus16:41 – 18:03
- 3☿︎ Mercury18:03 – 19:24
- 4☽︎ Moon19:24 – 20:46
- 5♄︎ Saturn20:46 – 22:08
- 6♃︎ Jupiter22:08 – 23:30
- 7♂︎ Mars23:30 – 00:52
- 8☉︎ Sun00:52 – 02:14
- 9♀︎ Venus02:14 – 03:35
- 10☿︎ Mercury03:35 – 04:57
- 11☽︎ Moon04:57 – 06:19
- 12♄︎ Saturn06:19 – 07:41
Other cities · Poland
Questions
How are the planetary hours calculated in Białystok?
On Wednesday, 31 December 2025, the Sun rises at 07:41 and sets at 15:19: the day lasts 7h 38m, that is twelve day hours of 38 min. The night, until the next sunrise at 07:41, lasts 16h 22m: twelve night hours of 1h 22m.
Which planet rules the first hour that day?
Mercury, from 07:41 to 08:19: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.