April 15

 Thou hast written of that meeting held in the quarter where standeth the city gate of ‘Abdu'l-'Azím. Do not call it a meeting. Call it a confluence of holy souls; a convocation of those who love the Lord; a retreat for the people of the All-Merciful; a palace-hall for all who sing His praise. For the members of that gathering are each one a lighted taper, and that council a mansion of the moon and stars. It hath been blessed by the Lord of all mankind, and hath made current the Feast as set forth in the Most Holy Book. 
('Abdu'l-Bahá, from a Tablet to an individual believer, translated from the Persian; The Compilation of Compilations, vol. I, Nineteen Day Feast)