The five-fold purpose of the International Conferences was:

1. offering humble thanksgiving to the Divine Author of our Faith, Who has graciously enabled His followers, during a period of deepening anxiety and amidst the confusion and uncertainties of a critical phase in the fortunes of mankind,
2. to prosecute uninterruptedly the Ten-Year Plan formulated for the execution of the Grand Design conceived by 'Abdu'l-Bahá,
3. of reviewing and celebrating the series of signal victories won so rapidly in the course of each of the campaigns of this world-encircling Crusade,
4. of deliberating on ways and means that will insure its triumphant consummation,
5. and of lending simultaneously a powerful impetus, the world over, to the vital process of individual conversion -the preeminent purpose underlying the Plan in all its ramifications - and to the construction and completion of the three Mother Temples to be built in the European, the African, and Australian continents. [CBN No 94 Nov 1957 p1]

Try also a shorter date like 1957-10-0 or 1957-10

try also the Chronology Canada — 1957-10-03 or 1957-10-0 or 1957-10