Planetary hours
in Mar del Plata.
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 Monday, 21 December 2026: day of the Moon
- Sunrise
- 05:24
- Sunset
- 20:12
- Next sunrise
- 05:24
A day hour lasts 1h 14m; a night hour, 46 min. Local time (America/Argentina/Buenos_Aires).
Day
- 1☽︎ Moon05:24 – 06:38
- 2♄︎ Saturn06:38 – 07:52
- 3♃︎ Jupiter07:52 – 09:06
- 4♂︎ Mars09:06 – 10:20
- 5☉︎ Sun10:20 – 11:34
- 6♀︎ Venus11:34 – 12:48
- 7☿︎ Mercury12:48 – 14:02
- 8☽︎ Moon14:02 – 15:16
- 9♄︎ Saturn15:16 – 16:30
- 10♃︎ Jupiter16:30 – 17:44
- 11♂︎ Mars17:44 – 18:58
- 12☉︎ Sun18:58 – 20:12
Night
- 1♀︎ Venus20:12 – 20:58
- 2☿︎ Mercury20:58 – 21:44
- 3☽︎ Moon21:44 – 22:30
- 4♄︎ Saturn22:30 – 23:16
- 5♃︎ Jupiter23:16 – 00:02
- 6♂︎ Mars00:02 – 00:48
- 7☉︎ Sun00:48 – 01:34
- 8♀︎ Venus01:34 – 02:20
- 9☿︎ Mercury02:20 – 03:06
- 10☽︎ Moon03:06 – 03:52
- 11♄︎ Saturn03:52 – 04:38
- 12♃︎ Jupiter04:38 – 05:24
Other cities · Argentina
Questions
How are the planetary hours calculated in Mar del Plata?
On Monday, 21 December 2026, the Sun rises at 05:24 and sets at 20:12: the day lasts 14h 49m, that is twelve day hours of 1h 14m. The night, until the next sunrise at 05:24, lasts 9h 12m: twelve night hours of 46 min.
Which planet rules the first hour that day?
The Moon, from 05:24 to 06:38: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Saturn, Jupiter, Mars, the Sun, Venus, Mercury, then the Moon 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.