2025 Summer Calendar United Statesman Meaning Dictionary. 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. Summer solstice 2025 (beginning of astronomical summer) on the day of the summer (june) solstice, the solar disk, moving along the ecliptic, will fall into its northernmost.
United states 2025 holiday calendar with all major holidays and observances. Friday, 20th june 2025, 7:43pm.