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 Sunday, 18 January 2026: day of the Sun
- Sunrise
- 07:30
- Sunset
- 15:45
- Next sunrise
- 07:29
A day hour lasts 41 min; a night hour, 1h 19m. Local time (Europe/Warsaw).
Day
- 1☉︎ Sun07:30 – 08:11
- 2♀︎ Venus08:11 – 08:53
- 3☿︎ Mercury08:53 – 09:34
- 4☽︎ Moon09:34 – 10:15
- 5♄︎ Saturn10:15 – 10:56
- 6♃︎ Jupiter10:56 – 11:37
- 7♂︎ Mars11:37 – 12:19
- 8☉︎ Sun12:19 – 13:00
- 9♀︎ Venus13:00 – 13:41
- 10☿︎ Mercury13:41 – 14:22
- 11☽︎ Moon14:22 – 15:04
- 12♄︎ Saturn15:04 – 15:45
Night
- 1♃︎ Jupiter15:45 – 17:03
- 2♂︎ Mars17:03 – 18:22
- 3☉︎ Sun18:22 – 19:41
- 4♀︎ Venus19:41 – 21:00
- 5☿︎ Mercury21:00 – 22:18
- 6☽︎ Moon22:18 – 23:37
- 7♄︎ Saturn23:37 – 00:56
- 8♃︎ Jupiter00:56 – 02:14
- 9♂︎ Mars02:14 – 03:33
- 10☉︎ Sun03:33 – 04:52
- 11♀︎ Venus04:52 – 06:10
- 12☿︎ Mercury06:10 – 07:29
Other cities · Poland
Questions
How are the planetary hours calculated in Białystok?
On Sunday, 18 January 2026, the Sun rises at 07:30 and sets at 15:45: the day lasts 8h 15m, that is twelve day hours of 41 min. The night, until the next sunrise at 07:29, lasts 15h 44m: twelve night hours of 1h 19m.
Which planet rules the first hour that day?
The Sun, from 07:30 to 08:11: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Venus, Mercury, the Moon, Saturn, Jupiter, Mars, then the Sun 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.