What Is The Last Day Of Summer 2024 Usa. Starts on tuesday, march 19 at 11:06 pm, and ends on june 20 at 4:51 pm. This is the longest day of the year and marks the.

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. Summer 2024 starts on thursday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth’s.