The 2025 summer solstice takes place on June 20, heralding the onset of astronomical summer and the longest day of the year.

The summer solstice, the longest day of the year in the Northern Hemisphere, falls on June 20 this year in North America, and June 21 in Europe.

Summer officially begins Friday, June 20, at 10:41 p.m. Eastern time. That’s the precise moment of the summer solstice — making for the longest, brightest day of the year in the Northern Hemisphere. Temperatures are toasty and the humidity is sweltering across much of the Lower 48. There’s no denying it’s summer.