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, 21 August 2026: day of Venus
- Sunrise
- 05:18
- Sunset
- 19:41
- Next sunrise
- 05:19
A day hour lasts 1h 12m; a night hour, 48 min. Local time (Europe/Warsaw).
Day
- 1♀︎ Venus05:18 – 06:30
- 2☿︎ Mercury06:30 – 07:42
- 3☽︎ Moon07:42 – 08:53
- 4♄︎ Saturn08:53 – 10:05
- 5♃︎ Jupiter10:05 – 11:17
- 6♂︎ Mars11:17 – 12:29
- 7☉︎ Sun12:29 – 13:41
- 8♀︎ Venus13:41 – 14:53
- 9☿︎ Mercury14:53 – 16:05
- 10☽︎ Moon16:05 – 17:17
- 11♄︎ Saturn17:17 – 18:29
- 12♃︎ Jupiter18:29 – 19:41
Night
- 1♂︎ Mars19:41 – 20:29
- 2☉︎ Sun20:29 – 21:18
- 3♀︎ Venus21:18 – 22:06
- 4☿︎ Mercury22:06 – 22:54
- 5☽︎ Moon22:54 – 23:42
- 6♄︎ Saturn23:42 – 00:30
- 7♃︎ Jupiter00:30 – 01:18
- 8♂︎ Mars01:18 – 02:07
- 9☉︎ Sun02:07 – 02:55
- 10♀︎ Venus02:55 – 03:43
- 11☿︎ Mercury03:43 – 04:31
- 12☽︎ Moon04:31 – 05:19
Other cities · Poland
Questions
How are the planetary hours calculated in Białystok?
On Friday, 21 August 2026, the Sun rises at 05:18 and sets at 19:41: the day lasts 14h 24m, that is twelve day hours of 1h 12m. The night, until the next sunrise at 05:19, lasts 9h 38m: twelve night hours of 48 min.
Which planet rules the first hour that day?
Venus, from 05:18 to 06:30: 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.