Directives From the Guardian
Page 30
 

75: NAW-RÚZ FEAST (Observance of Feast Day Calendar)
 
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"The Naw-Rúz Feast should be held on March 21 before sunset and has nothing to do with the 19-day Feast. The 19-day Feast is administrative in function whereas the Naw-Rúz is our New Year, a Feast of hospitality and rejoicing."