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, 20 May 2026: day of Mercury
- Sunrise
- 04:21
- Sunset
- 20:27
- Next sunrise
- 04:19
A day hour lasts 1h 21m; a night hour, 39 min. Local time (Europe/Warsaw).
Day
- 1☿︎ Mercury04:21 – 05:41
- 2☽︎ Moon05:41 – 07:02
- 3♄︎ Saturn07:02 – 08:22
- 4♃︎ Jupiter08:22 – 09:43
- 5♂︎ Mars09:43 – 11:03
- 6☉︎ Sun11:03 – 12:24
- 7♀︎ Venus12:24 – 13:44
- 8☿︎ Mercury13:44 – 15:05
- 9☽︎ Moon15:05 – 16:25
- 10♄︎ Saturn16:25 – 17:46
- 11♃︎ Jupiter17:46 – 19:07
- 12♂︎ Mars19:07 – 20:27
Night
- 1☉︎ Sun20:27 – 21:06
- 2♀︎ Venus21:06 – 21:46
- 3☿︎ Mercury21:46 – 22:25
- 4☽︎ Moon22:25 – 23:04
- 5♄︎ Saturn23:04 – 23:44
- 6♃︎ Jupiter23:44 – 00:23
- 7♂︎ Mars00:23 – 01:03
- 8☉︎ Sun01:03 – 01:42
- 9♀︎ Venus01:42 – 02:21
- 10☿︎ Mercury02:21 – 03:01
- 11☽︎ Moon03:01 – 03:40
- 12♄︎ Saturn03:40 – 04:19
Other cities · Poland
Questions
How are the planetary hours calculated in Białystok?
On Wednesday, 20 May 2026, the Sun rises at 04:21 and sets at 20:27: the day lasts 16h 06m, that is twelve day hours of 1h 21m. The night, until the next sunrise at 04:19, lasts 7h 52m: twelve night hours of 39 min.
Which planet rules the first hour that day?
Mercury, from 04:21 to 05:41: 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.