Summer Solstice 2024 Australia Dateinasia. The date of the winter solstice will be australia’s shortest day of the year based on daylight hours, while the surrounding nights will be australia’s longest nights of the year based. Spring equinox 20 march, summer solstice 21 june, autumn equinox 22 september, winter solstice 21 december.

The summer solstice occurs annually across the southern hemisphere between december 21 and 23. June solstice is known as the winter solstice in the southern hemisphere where australia is part of.