For 36 years, Urban Shaman Mama Donna Henes has been holding spring equinox celebrations in which she invites New Yorkers to stand hundreds of eggs on their end. Many claim this is only possible on the equinox (it’s not), but the real purpose of this spring egg balancing act, according to Chinese tradition, is to bring you good luck for the entire year. Typically Henes holds her eggstravaganzas in Manhattan, but this year she is bringing her ritual welcoming of spring to Grand Army Plaza on Sunday, starting around 7pm, before the vernal equinox at 7:21. She’ll have 360 eggs waiting for you under the arch (any unbroken ones will be donated afterward to CHIPS) and she welcomes drums and other musical instruments. Considering the winter we’ve had, this sounds like the most eggcellent drum circle imaginable.