 The Bahá 'í calendar is based upon the calendar established by the Báb . The year consists of 19 months , each having 19 days , with four or five intercalary days , to make a full solar year . The Bahá 'í New Year corresponds to the traditional Persian New Year , called <unk> <unk> , and occurs on the vernal equinox , near 21 March , at the end of the month of fasting . Bahá 'í communities gather at the beginning of each month at a meeting called a Feast for worship , consultation and socializing . 
