for_his_glory
Here is what we have to work with... Do not apply days of the week just yet because depending on the year, the days change.
14th of Nissan is not only Passover, but it is also what is known as the Day of Preparation. This is the day that Jews must ensure that no leaven is found in their house because the 15th is the High Sabbath and begins the feast of unleavened bread. It is also the day the Passover lamb is slaughtered and prepared.
On the 15th, as we have mentioned, is a High Sabbath. This means whatever day the 15th falls on, regardless of what day, it's a Sabbath. You can find this in Leviticus 23. On the 15th, the Passover meal is eaten.
Now, let's look at some dates that we know Passover would have occurred between 26-34 CE.
34 CE is the only Passover that occurs on a Thursday. Most Scholars that I have read put the death of Jesus at 30CE which puts Passover on a Friday.
This is where it gets weird when you start talking about a Friday crucifixion. You can easily count 3 days (Friday, Saturday, Sunday) but you only come up with 2 nights. (Saturday and Sunday) which doesn't sit well with the words of Jesus and the sign of Jonah.
So, here is what we have to work with for a Friday Crucifixion to come up with 3 nights.
Keep in mind that Friday Day slips into Saturday Night which becomes Saturday Day, then Sunday Night to Sunday Day. Clearly, only two nights are represented.
However, Jews meld Passover (14th) with the night of the 15th when the Passover meal is eaten. This, the night of the 15th is considered both the night of the 14th and 15th because the meal has to be eaten on the day it was prepared according to scripture.
The Bible states that Passover is on the 14th of Nissan, yet the Jewish calendar shows Passover starting the following night!
www.chabad.org
" note that, in a certain sense, the celebration of the 15th is considered to be an extension of the 14th. How so? With regard to sacrifices, the verse states, “And the flesh of his thanksgiving peace offering shall be eaten on the day it is offered up; he shall not leave any of it over until morning.”4 In other words, if you were given one day to eat an offering, the day consisted of the daytime followed by its night (unlike all other purposes, for which Jewish calendar days consist of the night followed by the day). Thus, as far as sacrifices are concerned, the night after a sacrifice is brought is an extension of the day it is brought."
Clearly, Jews think radically different than we do because their thinking is shaped by observing the law. Simply put, here is their problem. how can you eat the Passover meal the day it was offered when its offered at the end of the day and you are commanded to eat it the day it was offered... And we need to get into Exodus to better understand this.