Summer Solstice 20254 2025. When is summer estival solstice in usa 2025? Solstice and equinox precise dates and times for the united kingdom (london) gmt time zone.
The summer solstice represents the longest day, and the winter solstice the shortest. Summer begins with the solstice on friday, june 20, 2025, marking the astronomical first day of summer in the northern hemisphere.