When Is The Summer Solstice 2025. The times of the equinoxes mark the beginning of spring and fall. 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.
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. The times of the solstices mark the beginning of summer and winter.