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, 13 May 2026: day of Mercury
- Sunrise
- 04:32
- Sunset
- 20:16
- Next sunrise
- 04:30
A day hour lasts 1h 19m; a night hour, 41 min. Local time (Europe/Warsaw).
Day
- 1☿︎ Mercury04:32 – 05:50
- 2☽︎ Moon05:50 – 07:09
- 3♄︎ Saturn07:09 – 08:28
- 4♃︎ Jupiter08:28 – 09:46
- 5♂︎ Mars09:46 – 11:05
- 6☉︎ Sun11:05 – 12:24
- 7♀︎ Venus12:24 – 13:42
- 8☿︎ Mercury13:42 – 15:01
- 9☽︎ Moon15:01 – 16:20
- 10♄︎ Saturn16:20 – 17:39
- 11♃︎ Jupiter17:39 – 18:57
- 12♂︎ Mars18:57 – 20:16
Night
- 1☉︎ Sun20:16 – 20:57
- 2♀︎ Venus20:57 – 21:38
- 3☿︎ Mercury21:38 – 22:19
- 4☽︎ Moon22:19 – 23:01
- 5♄︎ Saturn23:01 – 23:42
- 6♃︎ Jupiter23:42 – 00:23
- 7♂︎ Mars00:23 – 01:04
- 8☉︎ Sun01:04 – 01:45
- 9♀︎ Venus01:45 – 02:26
- 10☿︎ Mercury02:26 – 03:08
- 11☽︎ Moon03:08 – 03:49
- 12♄︎ Saturn03:49 – 04:30
Other cities · Poland
Questions
How are the planetary hours calculated in Białystok?
On Wednesday, 13 May 2026, the Sun rises at 04:32 and sets at 20:16: the day lasts 15h 44m, that is twelve day hours of 1h 19m. The night, until the next sunrise at 04:30, lasts 8h 14m: twelve night hours of 41 min.
Which planet rules the first hour that day?
Mercury, from 04:32 to 05:50: 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.