The Vernal equinox occurs on March 20th at 4:01 a.m. when the Sun shines directly on the equator and the length of night and day are nearly equal. This is also marks the first day of Spring in the Northern Hemisphere.

The Autumnal Equinox occurs on Sept. 22nd at 1:19 p.m. when the sun shines directly on the equator and the length of day and night is nearly equal. This is also marks the first day of Fall in the Northern hemisphere.