Winter solstice in Argentina set for June 21, 2026, at 5:24 AM HOA

The official start of winter in the Southern Hemisphere will be marked by the winter solstice on June 21, 2026, precisely at 05:24 Argentina Official Time (HOA). This astronomical event signifies the shortest day and longest night of the year, as one hemisphere is tilted furthest from the sun.

The winter solstice occurs annually due to the Earth's axial tilt of approximately 23.4 degrees relative to its orbital plane. This tilt causes varying amounts of sunlight to reach different regions of the planet throughout the year, resulting in the distinct seasons. While June 21 is the conventional date, the exact timing can vary slightly year to year.

This year's winter solstice will usher in the coldest season, characterized by reduced daylight hours and lower average temperatures. Winter will continue until September 22, 2026, when the spring equinox marks the beginning of spring. The term 'solstice' originates from the Latin 'solstitium,' meaning 'the sun stands still,' referring to the sun's apparent pause in its north-south movement in the sky.