16 The Father's Passover and Man's Atonement

Did Jesus and His disciples celebrate the actual time of the passover or did the Pharisees the next day?

Luke 22:8  And he sent Peter and John, saying, Go and prepare us the passover, that we may eat. 

Matt 26:18  And he said, Go into the city to such a man, and say unto him, The Master saith, My time is at hand; I will keep the passover at thy house with my disciples.

Luke 22:15  And he said unto them, With desire I have desired to eat this passover with you before I suffer:

John 11:55  And the Jews' passover was nigh at hand: and many went out of the country up to Jerusalem before the passover, to purify themselves.

What are the implications of the difference between the two dates?