Brain Post: 8 Facts About Summer Solstice Today, June 20, is the summer solstice, the longest day of the year, and the official start of summer in the Northern Hemisphere. This means that the beginning of winter is only six months away, on December 21, and daylight today is five hours and 28 minutes longer than it will be then. Ski season is even closer, as it […] Brains SnowBrains | June 20, 2025 2 Comments