When Is Summer 2025 In Usa. Acceptance letters start rolling out. The first day of summer, also known as the summer solstice, will occur on saturday, june 21, 2025, at 10:42 pm edt.
Summer 2025 starts on friday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth’s axis having reached its furthest tilt and begins to change directiion back. Seasons divide the year into four distinct periods of time named spring, summer, autumn/fall, and winter.