First Day Of Summer 2024 Calendar 2024. When is first day of summer in 2024 is thursday, june 20, and it lasts until sunday, september 22, inclusive. Summer begins with the solstice on thursday, june 20, 2024, marking the astronomical first day of summer in the northern hemisphere.

For dates and deadlines not found on the academic calendar, please review information found in the undergraduate catalog: This year’s summer solstice will arrive this thursday on june 20 for the northern hemisphere, according to nasa.