The Summer Solstice, which marks the beginning of the summer season, will take place on 21 December at 07 hours 44 minutes (local time). On this date the sun reaches the highest latitude in the Southern Hemisphere, which is also called maximum "South Declination" in astronomical and navigation terms, which coincides with the Tropic of Capricorn, at latitude 23° 27 minutes South.

The solstices are the dots of the ecliptic, which is the apparent movement of the Sun over the Earth's surface over a period of a year, when the Sun reaches its highest declination, called Summer and Winter Solstice respectively. In the Northern and Southern Hemispheres, the declination of the Sun remains almost unchanged for several days; hence the name "Solstice", which in Latin means "Quiet Sun".