Contradiction with John 7:8
Jesus says, "I go not up yet unto this feast," suggesting He does not know the time, which contrasts with His awareness in Matthew 26:2.
John 7:8: Go ye up unto this feast: I go not up yet unto this feast; for my time is not yet full come.
Contradiction with Mark 13:32
Jesus says that neither the angels in heaven nor the Son knows the day or the hour, which contradicts Him explicitly stating His impending crucifixion in Matthew 26:2.
Mark 13:32: But of that day and [that] hour knoweth no man, no, not the angels which are in heaven, neither the Son, but the Father.
Contradiction with Luke 12:40
Jesus advises to be ready for the Son of Man will come at an unexpected hour, implying uncertainty, unlike His certain statement in Matthew 26:2.
Luke 12:40: Be ye therefore ready also: for the Son of man cometh at an hour when ye think not.
Contradiction with Acts 1:7
It is not for humans to know times or seasons which the Father has put in His own power, contradicting Jesus's declaration of timing in Matthew 26:2.
Acts 1:7: And he said unto them, It is not for you to know the times or the seasons, which the Father hath put in his own power.