When Is The Last Day Of Summer 2024. This year, astronomical summer began on 21 june 2022 and ended on 23 september 2022. Here's everything you need to know about the northern hemisphere's.
Sunday, sep 22 8:43 am edt. Although some consider summer’s end to be labor day or when the kids go back to school, the official last day of summer for 2024 is september 22.