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, 15 May 2026: day of Venus
- Sunrise
- 04:28
- Sunset
- 20:19
- Next sunrise
- 04:27
A day hour lasts 1h 19m; a night hour, 41 min. Local time (Europe/Warsaw).
Day
- 1♀︎ Venus04:28 – 05:48
- 2☿︎ Mercury05:48 – 07:07
- 3☽︎ Moon07:07 – 08:26
- 4♄︎ Saturn08:26 – 09:45
- 5♃︎ Jupiter09:45 – 11:05
- 6♂︎ Mars11:05 – 12:24
- 7☉︎ Sun12:24 – 13:43
- 8♀︎ Venus13:43 – 15:02
- 9☿︎ Mercury15:02 – 16:21
- 10☽︎ Moon16:21 – 17:41
- 11♄︎ Saturn17:41 – 19:00
- 12♃︎ Jupiter19:00 – 20:19
Night
- 1♂︎ Mars20:19 – 21:00
- 2☉︎ Sun21:00 – 21:40
- 3♀︎ Venus21:40 – 22:21
- 4☿︎ Mercury22:21 – 23:02
- 5☽︎ Moon23:02 – 23:42
- 6♄︎ Saturn23:42 – 00:23
- 7♃︎ Jupiter00:23 – 01:04
- 8♂︎ Mars01:04 – 01:44
- 9☉︎ Sun01:44 – 02:25
- 10♀︎ Venus02:25 – 03:05
- 11☿︎ Mercury03:05 – 03:46
- 12☽︎ Moon03:46 – 04:27
Other cities · Poland
Questions
How are the planetary hours calculated in Białystok?
On Friday, 15 May 2026, the Sun rises at 04:28 and sets at 20:19: the day lasts 15h 51m, that is twelve day hours of 1h 19m. The night, until the next sunrise at 04:27, lasts 8h 08m: twelve night hours of 41 min.
Which planet rules the first hour that day?
Venus, from 04:28 to 05:48: 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.