Nowruz, the Persian New Year, is celebrated on the vernal equinox ever year. This year marks the year 1391 on the Persian calendar.
March 20, 2012 An Afghan military helicopter flies over the crowd gathered for a celebration of the Persian New Year, Nowruz, at the Kart-e-Sakhi shrine in Kabul. Nowruz, the Farsi-language word for "new year," is an ancient Persian festival celebrated on the first day of spring in countries including Afghanistan and Iran. Musadeq Sadeq/AP