You are so misinformed.
Passover began at sundown the day before, and went to sundown the day of, Nissan 14.
The Passover lamb was slain the day it was eaten at the sundown meal of Nissan 14, the sundown before Passover daytime of Nissan 14.
You are so misinformed.
The feasts were not interchangeable, their names were interchangeable (Lk 22:1).
The Feast of Unleavened Bread (Nissan 15) always occurred the day after Passover (Nissan 14).
The OT observing Jews (prior to ascension of Jesus) did not make changes in the Levitical laws.
Their observance has changed now, which has nothing to do with observance before the ascention of Jesus. The NT records the practices and nomenclature of apostolic times, where Passover is simply called the Feast of Unleavened Bread, but it is not the Feast of Unleavened Bread.
Both feasts together were sometimes called Passover (Lk 22:1), the name of only one of them, but applied to both of them,
and were sometimes called Feast of Unleavened Bread (Mt 26:17), the name of only one of them, but applied to both of them because of their immediate proximity.
By NT times the names were virtually interchangeable.
And that fact of their interchanging the nomenclature, explained in the previous response here, I presented to you several times
(posts #80 and #44 on the Paul and Jesus thread), which each time you emphatically argued against.
What changed your mind?
What was celebrated in the first century after the ascension of Jesus in 30 AD is irrelevant. What was celebrated during the lifetime of Jesus,
as well as the interchangeable nomenclature of the two feasts used then (stated by you above in red), is what is recorded in the NT. . .which you simply do not understand.
You acknowlege the facts, as above in red, but you don't understand how they relate to one another. They are just isolated facts to you, having no bearing on one another.
In the OT they were always grouped into one celebration, at least to the ascension of Jesus, because of their immediate proximity--one following on the other
with no day in between.
Passover was on the Nissan 14, and the Feast of Unleavened Bread began on Nissan 15 and continued through Nissan 21, making eight days in a row of continuous feast.
They were always celebrated as one celebration, at least until the ascension of Jesus.
You've already stated, above in red, that the names for the two feasts were used interchangeably.
That is exactly what John does in his account.
He uses the name Passover to mean the Feast of Unleavened Bread. . .whose Day of Preparation is Nissan 14, which is the day of Passover.
John is not saying the Day of Prepration was Nissan 13.
He is using the name Passover, to refer to the Feast of Unleavened Bread (Nissan 15), whose Day of Preparation was Nissan 14, the day of Passover (Nissan 14),
and the day Jesus was crucified.
Do you have a source?
You haven't reckoned with the fact that the Feast of Unleavened Bread of NIssan 15, was only called the Passover of Nissan 14 (Lk 22:1).
So when John speaks of Passover, he is using the then common name for and referring to the Feast of Unleavened Bread.
Therefore, when John reports that Jesus died on the Day of Preparation for Passover, he is referring to the Day of Preparation for Unleavened Bread on Nissan 14.
John says no such thing. He says:
"It was just before the Passover feast" (nomenclature for Feast of Unleavened Bread, Nissan 15, per your statement above in red).
So John is saying that it was just before the Feast of Unleavened Bread (Nissan 15), which was the Day of Preparation for that feast (Nissan 14),
which was the day of Passover, and the day Jesus was crucified.
And regarding the Passover meal having not been eaten, John records five chapters (13-17) of the Passover meal which Jesus ate with them.
You have not reckoned with the fact that the Feast of Unleavened Bread was commonly called Passover, although it was not Passover (Lk 22:1).
Therefore, John is referring to the Feast of Unleavened Bread when he uses the term Passover.
You are so misinformed. . .Jewish practice after the ascension of Jesus in 30 AD is irrelevant.
You have the facts of nomenclature, which you stated above in red, but you don't know how to put them together.
They are just isolated facts to you, which have no bearing on one another.
Passover means Feast of Unleavened Bread (Lk 22:1). John is referring to the Feast of Unleavened Bread.
The names are interchangeable, the feasts are not. The Feast of Unleavened Bread was called the Passover (Lk 22:1), it was not the Passover itself.
You haven't reckoned with the nomenclature, where the Feast of Unleavened Bread is called Passover (Lk 22:1), it is not Passover itself.
The vast majority of what you stated is repetition over and over of the same misinformation. It has all been addressed previously once,
but you can't understand it because you see the facts, which you acknowledge above in red, as isolated, and do not see their bearing on one another.
I've done all I can in this regard. . .I'll let Pegg give it a try.