When Does Summer Start 2025. Start of spring, start of summer, start of autumn and start of winter mark the four seasons; One group reflects the seasonal changes (including 8 terms):
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. When in 2025 is summer?
