Entrance to the Shrine of Baha’u’llah, Acre, Israel. On 21 April, Baha’is begin the commemoration of the 12-day Festival of Ridvan, marking the period when Baha’u’llah declared His mission in Baghdad in 1863. On the first day of Ridvan every year, Baha’is vote for their local governing councils, the Local Spiritual Assemblies. During the Festival this year, Baha’is will also elect the Universal House of Justice to a five-year term.