Ridvan is a twelve day period special to Baha'is... It celebrates the announcement by Baha'u'llah that He fulfilled the expectation of the His Predecessor the Bab that He was " Him Whom God would make manifest". The Ridvan period is twelve days from April 21st to May 2nd each year. The first, ninth and twelfth days of Ridvan are Holy Days for Baha'is on which work and school attendance are suspended Baha'u'llah had been in exile from Persia from 1853 and was directed to Baghdad in the Ottoman Empire at the time... Eventually Persian authorities requested the Ottoman Sultan to move Baha'u'llah as they felt He was too close to their sites of pilgrimage near Baghdad. Baha'u'llah then left His House in Baghdad and stayed temporarily for twelve days near the Tigris River in what was then the Ridvan Garden. The Sultan had ordered Him to travel to Istanbul (Constaninople). John Walbridge has written a detailed account of the Ridvan Festival: Ridvan Read more: Ridvan – The Greatest Baha’i Festival Baha'i Institutions are also elected April 21st the start of the Ridvan Festival... Local Spiritual Assemblies in various jurisdictions are elected and a National Convention is held to elected the nine members of the National Spiritual Assembly. This year due to the virus... and various restrictions on gatherings there will be more "absentee" voting permitted. The National Convention has been cancelled. Delegates have already been selected from voting in the Unit Conventions last October and they in turn will select the nine members of the National Spiritual Assembly.