Here are a few links with more information:
Saturday, March 20, 2010
Spring Equinox/New Year
An old and dear friend sent an email around announcing the United Nations' recognition of the spring equinox holiday celebrated by Parsi Zoroastrians around the world as the beginning of the new year. March 21st is spring equinox for all, but for 300 million worldwide it is also the beginning of a new year.