April 21

Arise, and proclaim unto the entire creation the tidings that He who is the All-Merciful hath directed His steps towards the Ridván and entered it. Guide, then, the people unto the Garden of Delight which God hath made the Throne of His Paradise... Within this Paradise, and from the heights of its loftiest chambers, the Maids of Heaven have cried out and shouted: ‘Rejoice, ye dwellers of the realms above, for the fingers of Him Who is the Ancient of Days are ringing, in the name of the All-Glorious, the Most Great Bell, in the midmost heart of the heavens. The hands of bounty have borne round the cups of everlasting life. Approach, and quaff your fill.’ 
(Baha’u’llah, quoted by Shoghi Effendi in ‘God Passes By’)