The number of days in summer is calculated by adding the number of days from the summer solstice in June through the autumnal equinox in September. The number of days in summer varies slightly from one year to the next.Know More
The timing of the summer solstice and the autumnal equinox is not precisely the same from one year to the next. On the summer solstice, people enjoy the most daylight of any day of the year. Days start getting shorter following the summer solstice. Conversely, on the winter solstice, people experience the least amount of daylight during the course of the year. Days start becoming longer following the winter solstice.