Summer Begins 2025 Date. When do the four seasons start in 2025—for spring, summer, fall, and winter? The first day of summer, also known as the summer solstice, will occur on saturday, june 21, 2025, at 10:42 pm edt.
For the year 2024 the meteorological summer will begin on saturday, june 1, 2024 and will end on saturday, august 31, 2024. As 2025 gets started, planning for the year is in full swing.