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 Tuesday, 21 July 2026: day of Mars
- Sunrise
- 07:59
- Sunset
- 17:54
- Next sunrise
- 07:58
A day hour lasts 50 min; a night hour, 1h 10m. Local time (America/Argentina/Buenos_Aires).
Day
- 1♂︎ Mars07:59 – 08:49
- 2☉︎ Sun08:49 – 09:38
- 3♀︎ Venus09:38 – 10:28
- 4☿︎ Mercury10:28 – 11:17
- 5☽︎ Moon11:17 – 12:07
- 6♄︎ Saturn12:07 – 12:56
- 7♃︎ Jupiter12:56 – 13:46
- 8♂︎ Mars13:46 – 14:35
- 9☉︎ Sun14:35 – 15:25
- 10♀︎ Venus15:25 – 16:15
- 11☿︎ Mercury16:15 – 17:04
- 12☽︎ Moon17:04 – 17:54
Night
- 1♄︎ Saturn17:54 – 19:04
- 2♃︎ Jupiter19:04 – 20:14
- 3♂︎ Mars20:14 – 21:25
- 4☉︎ Sun21:25 – 22:35
- 5♀︎ Venus22:35 – 23:46
- 6☿︎ Mercury23:46 – 00:56
- 7☽︎ Moon00:56 – 02:06
- 8♄︎ Saturn02:06 – 03:17
- 9♃︎ Jupiter03:17 – 04:27
- 10♂︎ Mars04:27 – 05:38
- 11☉︎ Sun05:38 – 06:48
- 12♀︎ Venus06:48 – 07:58
Other cities · Argentina
Questions
How are the planetary hours calculated in Mar del Plata?
On Tuesday, 21 July 2026, the Sun rises at 07:59 and sets at 17:54: the day lasts 9h 54m, that is twelve day hours of 50 min. The night, until the next sunrise at 07:58, lasts 14h 05m: twelve night hours of 1h 10m.
Which planet rules the first hour that day?
Mars, from 07:59 to 08:49: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars 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.