Ridván is the Most Great Festival and it runs twelve days from 20 April, commemorating the period in 1863 when Bahá'u'lláh, about to be exiled from Baghdad to Constantinople, camped in the Najíbíyyih garden across the Tigris and there declared to his companions the claim he had held privately for a decade. The first, ninth and twelfth days are holy days on which work is suspended. What makes the festival institutionally remarkable is that the annual elections of every Local Spiritual Assembly in the world are held on the first day. The election method has no candidates: every adult Bahá'í in the locality is eligible, every adult votes, and each voter writes down nine names after prayer and reflection. Nomination, campaigning, canvassing, the discussion of names and any indication of a desire to serve are all prohibited, and soliciting a vote disqualifies. National Assemblies are elected by delegates at conventions on the same principle, and the Universal House of Justice by the members of all National Assemblies every five years.