On May 23, Baha’i's around the world will celebrate the holiday known as the Declaration of the Báb. It commemorates when the Báb announced in 1844 that he was the new messenger of God. The holiday begins two hours and eleven minutes after sunset on May 22, which is the exact time the Báb made his declaration. Báb served as a herald for Bahá’u’lláh, who is the central prophet of the Baha’i faith. Baha’is celebrate the Declaration of the Báb by gathering together and sharing prayers, stories, and reflections. It is one of the nine holy days in the Bahá'í Faith which means that work and school are suspended. https://www.bpl.org/