Summer Begins 2025 Date. What exactly is the summer solstice? Summer begins with the summer solstice, wednesday, june 20, 2029, 9:48 p.m.
The first day of summer, also known as the summer solstice, will occur on saturday, june 21, 2025, at 10:42 pm edt. Click on the date that interests you to see the lighting map of the earth on that date and time (beginning of the season).