2025 Solstice And Equinox Dates United States 2025. In 2025, summer solstice in the northern hemisphere will occur on thursday, june 20 around 4:50 p.m. Data for new york city (new york, united states), for the period.
Edt (2051 gmt), marking the longest day in the northern hemisphere. Spring equinox 19 march, summer solstice 20 june, autumn equinox 22 september, winter solstice 21 december.