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 Friday, 18 December 2026: day of Venus
- Sunrise
- 07:37
- Sunset
- 15:10
- Next sunrise
- 07:38
A day hour lasts 38 min; a night hour, 1h 22m. Local time (Europe/Warsaw).
Day
- 1♀︎ Venus07:37 – 08:15
- 2☿︎ Mercury08:15 – 08:52
- 3☽︎ Moon08:52 – 09:30
- 4♄︎ Saturn09:30 – 10:08
- 5♃︎ Jupiter10:08 – 10:46
- 6♂︎ Mars10:46 – 11:23
- 7☉︎ Sun11:23 – 12:01
- 8♀︎ Venus12:01 – 12:39
- 9☿︎ Mercury12:39 – 13:17
- 10☽︎ Moon13:17 – 13:54
- 11♄︎ Saturn13:54 – 14:32
- 12♃︎ Jupiter14:32 – 15:10
Night
- 1♂︎ Mars15:10 – 16:32
- 2☉︎ Sun16:32 – 17:55
- 3♀︎ Venus17:55 – 19:17
- 4☿︎ Mercury19:17 – 20:39
- 5☽︎ Moon20:39 – 22:01
- 6♄︎ Saturn22:01 – 23:24
- 7♃︎ Jupiter23:24 – 00:46
- 8♂︎ Mars00:46 – 02:08
- 9☉︎ Sun02:08 – 03:31
- 10♀︎ Venus03:31 – 04:53
- 11☿︎ Mercury04:53 – 06:15
- 12☽︎ Moon06:15 – 07:38
Other cities · Poland
Questions
How are the planetary hours calculated in Białystok?
On Friday, 18 December 2026, the Sun rises at 07:37 and sets at 15:10: the day lasts 7h 33m, that is twelve day hours of 38 min. The night, until the next sunrise at 07:38, lasts 16h 28m: twelve night hours of 1h 22m.
Which planet rules the first hour that day?
Venus, from 07:37 to 08:15: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Mercury, the Moon, Saturn, Jupiter, Mars, the Sun, then Venus 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.