What Is The First Day Of Summer 2024. This year the summer will start on thursday june 20, 2024 (day of the summer solstice) and will end on sunday september 22, 2024 with the autumnal equinox. What exactly is the summer solstice?

Is the summer solstice the first day of summer? The winter solstice marks the official start of the astronomical winter, as the sun reaches its most southerly point in the sky as seen from earth.