 
 <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. <hau> Bayanin da ya dace don amsa tambayar da ke sama shi ne: Daga baya, an fara amfani da Alkawarin a makarantun gwamnati a ranar 12 ga Oktoba, 1892, a lokacin bukukuwan ranar Columbus da aka shirya don daidai da buɗe World's Columbian Exposition (World's Fair na Chicago), Illinois. Don haka, amsar ita ce 12 ga Oktoba, 1892. 