Birth of the Báb commemorates the 1819 birth of Siyyid `Alí-Muhammad, known as the Báb, who declared himself a divine messenger in 1844 and is regarded by Bahá'ís as a forerunner to Bahá'u'lláh, similar to the role of a prophet heralding a new revelation. The Báb's own teachings and the religion he founded, Bábism, are seen by Bahá'ís as a preparation for the coming of Bahá'u'lláh. This holy day is one of several "Twin Birthdays" in the Bahá'í Faith and is typically marked with prayer gatherings, devotional readings, and celebration, often falling on consecutive days with the Birth of Bahá'u'lláh.