April 28

[The Festival of Ridvan,] the "Most Great Festival," the "King of Festivals," the "Festival of God" Himself -- the Festival associated with the accession of Him [Baha’u’llah] Who is the Lord of the Kingdom to the throne of everlasting glory, and with the formal assumption by Him of His prophetic office...
- Shoghi Effendi  (From a letter dated June 15, 1946; ‘Messages to America’)