Birth of the Báb
Twin Holy Birthdays: The Birth of the Báb (October 20, 1819) and the Birth of Bahá’u’lláh (November 12, 1817) occurred on consecutive days according to the Islamic lunar calendar (1 and 2 Muharram, respectively). These Holy Days are celebrated on the first and second days of the eighth lunar month after Naw-Rúz, and may fall as early as October 20-21 and as late as November 11-12.
About the Bahá’í Calendar and Holy Days
The Baha’i Faith has its own calendar, called the Badí’ Calendar. It is a solar calendar consisting of 19 months of 19 days each (361 days), plus “Intercalary Days” (four in ordinary years and five in leap years) to adjust the calendar to the solar year. The days and months are named after the attributes of God. The Nineteen Day Feast, the primary community gathering for Baha’is in each town and city, is held on the first day of each Baha’i month. Eleven Holy Days mark significant events in Baha’i history.