Noun: spring equinox
- The spring equinox in the Northern Hemisphere, occurring around March 20 or 21, when day and night are of equal length
"The spring equinox marks the beginning of spring";
- vernal equinox, March equinox
Derived forms: spring equinoxes
Type of: equinox
Antonym: September equinox
Part of: Mar, March, spring, springtime
Encyclopedia: Spring equinox