When Does Summer Start 2025 Usa Dates. Summer begins with the summer solstice, friday, june 20, 2025, 10:42 p.m. Summer 2025 starts on sunday and ends on sunday.
138 rows united states 2025 holiday calendar with all major holidays and observances. Fall begins with the autumnal equinox, monday, september 22, 2025, 2:19 p.m.