【鎏金大气年度季度月度销售喜报贺报战报】】 summer solstice ,also called the summer solstice or the longest day, is an event that occurs when the sun appears at its highest point in the sky. This phenomenon happens on the summer solstice, which typically falls on June 20 or 21 in the Northern Hemisphere and December 21 or 22 in the Southern Hemisphere. On this day, the northern hemisphere receives the most sunlight of the year, while the southern hemisphere receives the least amount of sunlight. The sun's rays strike the earth at its highest angle, resulting in the longest daylight period of the year. As a result, summer solstice marks the beginning of summer and is often celebrated with various festivals and rituals. In ancient China, the summer solstice was considered a sacred day, and people would offer sacrifices to the gods and perform traditional dances to ensure good harvests and prosperity.