 
<translate> Iji zaa ajụjụ a dị n'elu, ihe anyị ga-ekwu bụ: N'Ebe Ugwu Amerịka, kemgbe afọ 1920 ka a na-eme ememme Halloween n'obodo a. Azịza ya: ná ngwụsị afọ ndị 1920. <eng> To answer the above question, the relevant sentence is: In North America, trick-or-treating has been a Halloween tradition since the late 1920s.
The answer: the late 1920s. 