2025/6/21 (Sat.) Summer Solstice
2025/6/21 (Sat.) Summer Solstice
The summer solstice is one of the 24 solar terms. It starts around June 21st every year, when the Big Dipper points to noon and the sun reaches 90° of the ecliptic longitude. It is the earliest solar term to be determined. In the 7th century BC, the ancients used a gnomon to measure the sun's shadow. The shadow was the shortest on the summer solstice, so this day was called the "summer solstice." ...
Administrative Unit:
Secretary's Office
Date:
2025/06/21
