Isn't that great?! It certainly doesn't create much confidence in the program, does it?
Calendar-wise, "summer" is June thru August.
Culturally, "summer" is Memorial Day thru Labor Day.
Astronomically, "summer" on this part of the planet is June 21st to September 21st.
Even in SoCal when we get our hottest days of the year in September and early October, I consider summer to end on Labor Day. I refuse to watch any beach movie with Frankie Avalon and Annette Funicello after that date, it's a hard and fast rule in my home. That, and the white linen trousers go to the back of the closet.