First Day of Spring
March 20, 2021
The astronomical spring in the Northern Hemisphere began on Monday, March 20 and will end on Wednesday, June 21. The spring (vernal) equinox in the Northern Hemisphere is also known as the March equinox. It’s called the “autumnal (fall) equinox” in the Southern Hemisphere. … This happens on March 19, 20 or 21 every year.