For the Northern Hemisphere, the official summer season starts on June 20 or 21, depending on where you live, with the arrival of the summer solstice. So what is a solstice, exactly? It's the ...

Others use astronomical terms, marking the first day of the season by the summer solstice, which takes place on June 20 or 21 in the Northern Hemisphere. When is the summer solstice? The 2025 June ...