Planetary hours
in Saint Petersburg.
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, 17 December 2025: day of Mercury
- Sunrise
- 09:57
- Sunset
- 15:52
- Next sunrise
- 09:58
A day hour lasts 30 min; a night hour, 1h 30m. Local time (Europe/Moscow).
Day
- 1☿︎ Mercury09:57 – 10:26
- 2☽︎ Moon10:26 – 10:56
- 3♄︎ Saturn10:56 – 11:26
- 4♃︎ Jupiter11:26 – 11:55
- 5♂︎ Mars11:55 – 12:25
- 6☉︎ Sun12:25 – 12:54
- 7♀︎ Venus12:54 – 13:24
- 8☿︎ Mercury13:24 – 13:54
- 9☽︎ Moon13:54 – 14:23
- 10♄︎ Saturn14:23 – 14:53
- 11♃︎ Jupiter14:53 – 15:22
- 12♂︎ Mars15:22 – 15:52
Night
- 1☉︎ Sun15:52 – 17:22
- 2♀︎ Venus17:22 – 18:53
- 3☿︎ Mercury18:53 – 20:23
- 4☽︎ Moon20:23 – 21:54
- 5♄︎ Saturn21:54 – 23:24
- 6♃︎ Jupiter23:24 – 00:55
- 7♂︎ Mars00:55 – 02:25
- 8☉︎ Sun02:25 – 03:56
- 9♀︎ Venus03:56 – 05:26
- 10☿︎ Mercury05:26 – 06:57
- 11☽︎ Moon06:57 – 08:27
- 12♄︎ Saturn08:27 – 09:58
Other cities · Russia
Questions
How are the planetary hours calculated in Saint Petersburg?
On Wednesday, 17 December 2025, the Sun rises at 09:57 and sets at 15:52: the day lasts 5h 55m, that is twelve day hours of 30 min. The night, until the next sunrise at 09:58, lasts 18h 06m: twelve night hours of 1h 30m.
Which planet rules the first hour that day?
Mercury, from 09:57 to 10:26: 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.