Look at a good Jewish calendar. The only year that even comes close to fitting the biblical chronology is 31AD. In 31AD the Preparation Day for the Feast of the Passover fell on Wednesday, Nisan 14. The next day, Thursday, Nisan 15, was the First Day of Passover and therefore a Special Sabbath not the normal weekly Sabbath. This is confirmed by John 19:31, "The Jews therefore, because it was the preparation, that the bodies should not remain upon the cross on the sabbath day, (for that sabbath day was an high day,) besought Pilate that their legs might be broken, and that they might be taken away."
You can speculate all you want about the meaning of words but the fact remains that a good Jewish calendar will go a long way in dispelling your confusion.
Chronology:
1. Wednesday, Nisan 14. Preparation Day. Christ crucified.
2. Thursday, Nisan15. First Day of Passover, a High Holy Day, IE special sabbath.
3. Friday, Nisan 16. Normal work day. The ladies went to the market to buy the spices to wrap His body.
4. Saturday, Nisan 17. Weekly Sabbath. The ladies could not complete the burial process due to the weekly sabbath.
5. Sunday, Nisan 18. Ladies arrived prior to sunup and He was already gone. Arose after sundown which was the beginning of the first day of the week, after being in the grave for three days and three nights just like the bible says.
One thing you missed the unleavened bread feast was 15 Nisan which would have been the high sabbath, 14 nissan was the passaover and the 13th would have been the day the lamb was killed. 33 A.D. Jewish calender shows this perfectly. Wednesday the 13 Nisan 33 A.D. started on what is our Tuesday evening at 6:00 ended Wednesday at 6:00. This would have been the prepartion day. Notice "John 19: 14 And it was the preparation of the passover, and about the sixth hour: and he saith unto the Jews, Behold your King!" So Wednesday evening would have begun the Passover. The evening of His crucifixion they went to the upper room where they planned to have passover, never does it say they ate the passover meal. Here is John 13:1 "Now before the feast of the passover, when Jesus knew that his hour was come that he should depart out of this world unto the Father, having loved his own which were in the world, he loved them unto the end."
verse 2 "And supper being ended, the devil having now put into the heart of Judas Iscariot, Simon's son, to betray him;"
John goes from saying before the feast of passover to saying hey were eating supper, not the feast. Matthew 26: 26 "And as they were eating, Jesus took bread, and blessed it, and brake it, and gave it to the disciples, and said, Take, eat; this is my body." As they were eating, again no mention of eating the passover. Mark 14:12 "And the first day of unleavened bread, when they killed the passover, his disciples said unto him, Where wilt thou that we go and prepare that thou mayest eat the passover?" Matthew states the beginning of unleavened bread, the feast itself was on the 15th so the preparation for the two began on the 13th. Mark 14: 18 "And as they sat and did eat, Jesus said, Verily I say unto you, One of you which eateth with me shall betray me." 22 "And as they did eat, Jesus took bread, and blessed, and brake it, and gave to them, and said, Take, eat: this is my body."
Again no mention of eating the passover meal, they ate.
Luke 22: 15 And he said unto them, With desire I have desired to eat this passover with you before I suffer:
He desires to eat it but did he, seems by all the other passages He didn't get to eat it.
His human desire wanted to but as the other passages show he didn't.
16 For I say unto you, I will not any more eat thereof, until it be fulfilled in the kingdom of God.
He tells them He will not be able to eat it.
19 And he took bread, and gave thanks, and brake it, and gave unto them, saying, This is my body which is given for you: this do in remembrance of me.
Notice He took bread but the passover feast was a Lamb.
20 Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you.
So all this was taking place on the 13th our Tuesday night their Wednesday. Then Pilate examines the Lamb and finds it worthy. He found no fault.