February 27

" ... In the Arabic Bayán the Báb called upon His followers to gather together once every nineteen days to show hospitality and fellowship. Baha'u'llah here confirms this and notes the unifying force of such occasions. 'Abdu'l-Baha and Shoghi Effendi after Him, gradually unfolded the institutional significance of this injunction. 'Abdu'l-Baha emphasized the importance of the spiritual and devotional aspects of these gatherings. Shoghi Effendi, besides further elaborating the devotional and social aspects of the Feast, has developed the administrative element of such gatherings and, in systematically instituting the Feast, has provided for a period of consultation on the affairs of the Baha'i community, including the sharing of news and messages. 
(The Universal House of Justice: "Notes" appended to The Kitab-i-Aqdas)