Today marks the start of astronomical spring (remember, climatological spring started on March 1). It is also known as the vernal equinox because days and nights are of equal length. It’s the earliest start to spring in well over 100 years because of the leap year and other factors. You can read more at EarthSky at https://earthsky.org/astronomy-essentials/everything-you-need-to-know-vernal-or-spring-equinox .
