Source spring officially starts Spring Equinox Spring Equinox – Vernal Equinox, Southern & Northern vernal (spring) equinox http://www.timeanddate.com/calendar/spring-equinox.html Vernal Equinox Spring Equinox – Vernal Equinox, Southern & Northern The First Day of Spring "spring equinox" equinox in the Northern Hemisphere will begin at 5:45 p.m. "spring (vernal) equinox" timeanddate.com vernal equinox. Mic/TimeandDate Spring Equinox – Vernal Equinox, Southern & Northern Spring Equinox – Vernal Equinox, Southern & Northern vernal equinox Spring Equinox – Vernal Equinox, Southern & Northern The Vernal Equinox Spring Equinox – Vernal Equinox, Southern & Northern vernal equinox exact moment www.timeanddate.com 9:30 PM http://www.timeanddate.com/calendar/spring-equinox.html timeanddate.com Source www.timeanddate.com Spring Equinox – Vernal Equinox, Southern & Northern occur "spring equinox"