2025 Summer Calendar Date Usa. Calendar with 2025 celebrations and holidays of the united states. Holidays and observances for year 2025.
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. In different time zones, the date of the solstice can differ by a day, so it is important to indicate your exact location.