Grosummer Solstice 20254 2025 Calendar. 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. Solstice and equinox precise dates and times for the united kingdom (london) gmt time zone.
When is summer solstice 2025. The first day of summer, also known as the summer solstice, will occur on saturday, june 21, 2025, at 10:42 pm edt.
