Your third question concerns the day on which the Feast
should be held every month. The Guardian stated in reply that no special day
has been fixed, but it would be preferable and most suitable if the gathering
of the friends should be held on the first day of each Bahá'í month. (In a letter written on behalf of Shoghi
Effendi, 1 December 1936 to an individual believer, translated from the Persian;
The Compilation of Compilations, vol. I, The Nineteen Day Feast)