 
 <translate> The relevant information to answer the above question is: Subsequently, the Pledge was first used in public schools on October 12, 1892, during Columbus Day observances organized to coincide with the opening of the World's Columbian Exposition (the Chicago World's Fair), Illinois. So, the answer is October 12 , 1892. <ibo> Ihe ọmụma dị mkpa iji zaa ajụjụ ahụ dị n'elu bụ: E mesịrị jiri Nkwekọrịta ahụ mee ihe na nke mbụ ya n'ụlọ akwụkwọ ọha na eze n'October 12, 1892, n'oge ememe Columbus Day e mere iji kwekọọ ná mmeghe nke Ihe Ngosi Ihe Nkà nke Ụwa (Chicago World's Fair), Illinois. Ya mere, azịza ya bụ Ọktoba 12, 1892. 