'Year' in the Bible

But one of them, Caiaphas, who was high priest that year, said to them, You have no knowledge of anything;

He did not say this of himself, but being the high priest that year he said, as a prophet, that Jesus would be put to death for the nation;

They took him first to Annas, because Annas was the father-in-law of Caiaphas who was the high priest that year.

But every year you make a request to me to let a prisoner go free at the Passover. Is it your desire that I let the King of the Jews go free?