the vernal equinox

Nowruz (New Year)
Afghanistan, Iran, Baha’i, Kurdish, Parsi

Pocahontas’ Death Anniversary (Native American)

 

Eric Weisstein’s Trea­sure Trove of Astron­o­my

Eggs and the Ver­nal Equinox

 

And, of course, the Pesach Seder begins on the first full moon fol­low­ing the Ver­nal Equinox.