When Is The First Day Of Summer 2025. This year, the season begins on thursday, march 20, 2025. * the dates of summer given.
(in the southern hemisphere, it is around december 21 or 22.) this date is considered to be the first. 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.
