When Is The Summer Solstice 2024 Australia. The summer solstice signals the beginning of astronomical summer and the winter solstice signals the beginning of winter. The summer solstice falls between december 21 and 23 in the southern hemisphere each year.

21, 2024, at 5:29 a.m. The first day of summer is marked by the summer solstice, which corresponds to the astronomical beginning of summer.