First Day Of Summer 2024 Australia Time. The summer solstice falls between december 21 and 23 in the southern hemisphere each year. This year’s december solstice i.e the first day of summer in australia (southern hemisphere).
Summer begins with the solstice on thursday, june 20, 2024, marking the astronomical first day of summer in the northern hemisphere. In the southern hemisphere, it will occur on december 21 at 09:20 gmt.