The title Báb (Gate) was assumed by Siyyid 'Alí-Muhammad, the Forerunner of Bahá'u'lláh, and Founder of the Bábí Faith. The Báb proclaimed Himself to be the Qá’im, the Promised One, and said that the Mission of His Dispensation was to alert the people to the imminent advent of another Prophet, "Him Whom God shall make manifest".
Bahá’ís revere the Báb as the Forerunner or Herald of Bahá'u'lláh, but also as a Messenger of God in His own right, and consider His Writings as Holy Scripture. The beginning of the Bahá’í Era is dated from the day of His Declaration. The Declaration, His birth and the date of His martyrdom are observed as Bahá’í Holy Days.

Founder of the Bahá’í Faith and the Messenger of God for this Day. He was born Mírzá Husayn-‘Alí on 23 November 1817 to a noble family in Iran. Bahá'u'lláh (Glory of God) became a follower of the Báb in 1844 at the age of twenty-seven. Being a Bábí at this time meant persecution and He was imprisoned in an underground prison known as the Síyáh-Chál (Black Pit). It was there He first received a revelation that He was the One promised by the Báb.
The central theme of Bahá'u'lláh's Teachings is unity - unity of religions and unity of the human race. He writes: "The well-being of mankind, its peace and security, are unattainable unless and until its unity is firmly established".

Eldest surviving son of Bahá'u'lláh, His designated successor and authorized Interpreter of His Writings. He chose the name of ‘Abdu’l-Bahá (Servant of God) after the passing of His Father, holding a station radically and fundamentally different from that of Bahá'u'lláh and His Forerunner (The Báb).
Bahá’ís regard ‘Abdu’l-Bahá not as a prophet but as the perfect Exemplar of the Bahá’í Faith and show special respect to His unique station. Renowned outside the Bahá’í community for His humanitarian work, ‘Abdu’l-Bahá was knighted in 1920 by the British government for His efforts for the relief of hunger in Palestine during World War I.