Adam Clarke on Matthew 24:36

But of that day and hour - Ωρα, here, is translated season by many eminent critics, and is used in this sense by both sacred and profane authors. As the day was not known, in which Jerusalem should be invested by the Romans, therefore our Lord advised his disciples to pray that it might not be on a Sabbath; and as the season was not known, therefore they were to pray that it might not be in the winter; Mat 24:20. See on Mar 13:32 (note).