Farvardin (Persian: فروردین, Persian pronunciation: [fæɾvæɾˈdiːn]) is the first month of the Solar Hijri calendar, the official calendar of Iran and Afghanistan. Farvardin has thirty-one days. It is the first month of the spring season (Bahar[disambiguation needed] ), and is followed by Ordibehesht.
In three out of every four years, Farvardin begins on March 21 and ends on April 20 of the Gregorian calendar. In the remaining years, it begins on March 19 or 22, and ends on April 18 or 21.
Its associated astrological sign in the tropical zodiac is Aries.