Before we can accurately and thoroughly answer this question, we have to first look at two huge issues that are the entire source of the confusion.
This quote is from one of the "answers" and is the classic example of these two myths recycled over and over but it doesn't fit with scripture or history. [Notice the two phrases starred in the quote]
So Jesus was crucified AND buried on a Friday, **the Preparation day for the Passover. Jesus stayed in the tomb from Friday late afternoon until Sunday, the first Day of the week. That would be THREE DAYS in the tomb **according to the way the Jews reckoned 'days'. (A partial day was counted as a day)."
- Early church leaders and the translators did not understand Jewish feasts, and the specific commands surrounding them, and Jewish culture.
- People have a flawed and incomplete understanding of something that is known as Jewish inclusive reckoning, and because they don't understand the concept properly, they use it as a red herring to support the fallacious notion of a Friday crucifixion.
Specifically, they didn't understand that Hebrew word Shabbat [the basis for the word Sabbath] is the weekly sabbath but it is also the 7 feasts of the Lord. Pentecost/ Shavuot is Shabbat, Feast of Unleavened bread is Shabbat and Feast of Trumpets/Yom Teruah and Day of Atonement/Yom Kippur are all Shabbat. 1 word used for weekly sabbath and 7 feasts.
We see this misnomer perpetuated over and over in commentaries, forums like this and even taught by pastors and laymen alike.
People twist the plain words of scripture and Christ himself to get them to "fit" a narrative perpetuated by the early church because they don't understand Jewish culture and the feasts.
They read the passage in John 19:14-16 and assume that this meant the preparation before the weekly sabbath.
"Now it was the day of preparation for the Passover; it was about the sixth hour. And he said to the Jews, “Behold, your King!” So they cried out, “Away with Him, away with Him, crucify Him!” Pilate *said to them, “Shall I crucify your King?” The chief priests answered, “We have no king but Caesar.”
But in Jewish culture, there are 7 feasts, but some are considered High Sabbaths, in which no work at all can be done - including cooking.
Because Jews use a solar/lunar calendar, all the feasts for the entire year are based on the lunar cycle, and each month starts with a new moon and this means that Passover which is Nisan 14th always lands on a full moon.
Passover is the 14th of Nisan, and is the preparation for the High Sabbath of Feast of Unleavened bread in which no work could be done, - no cooking, making a fire, or buying or selling of spices.
John also states explicitly that there was a Special or High Sabbath, and it was for this reason that they had to get the bodies down from the cross before the High Sabbath began at sunset.
Matthew also records that there were two Sabbaths that week, and The Forerunner Bible commentary confirms that the correct translation in Matthew is after the Sabbaths - plural. 'Shabbaton'
"Matthew 28:1 provides additional proof of two Sabbaths occurring that week. However, the Bible's translators, confused by the Greek wording of this verse, have consistently mistranslated it. Matthew writes, "Now after the Sabbath, as the first day of the week began to dawn . . . ." The wording of the original text, though, reads, "after the Sabbaths" - plural! https://www.bibletools.org/index.cfm/fuseaction/Topical.show/RTD/cgg/ID/5231/After-Sabbaths.htm
https://www.blueletterbible.org/faq/crux.cfm
For example, Leviticus 23:4-8 speaks of two feasts, Passover and Unleavened Bread. Passover starts on the 14th day of Nisan (Hebrew month) and lasts one day. The Feast of Unleavened Bread starts the next day (i.e., the 15th of Nisan) and lasts for seven days.
Please note, the Passover is not a High Sabbath day, this important fact is often overlooked. You can tell because the usual command for a sabbath of "an holy convocation and no servile work is to be done," is not given for Passover. So while Passover is a feast day, it is not a sabbath day. "Why is that important?" you ask. It was on this day Jesus did the work of redemption. Servile work would have been unlawful on a Sabbath day, so God ordained for this day to be a festival, remembering the lamb's blood that caused the angel to "Passover" the Israelites in Egypt and pointing to the Lamb who would shed His blood for all mankind."
So they start with a false premise, -Friday crucifixion- based entirely on a flawed understanding of Sabbath, then, to make this theory fit - they use an equally flawed understanding of Jewish counting to support this fallacy, like wrapping tin foil around a tennis ball to make it "fit".
People invoke "Hebrew reckoning" which is a common practice of counting any part of a day as a full day - just like towing companies do. They get your car on 10:00 pm Saturday night, and you pick it up at 8:30 Monday, and they charge your for 3 days - Part of Saturday, Sunday and 1 Hr on Monday.
However, clear passages always trump or take precedent over vague passages, and in cases like this, where the text explicitly says 3 days and 3 nights - Hebrew inclusive reckoning does not apply. This is confirmed by multiple Rabbis of both reformed and orthodox Judaism.
We should also note that the Pharisees asked for a sign that Jesus was the true Messiah, and the only sign that he gave them was the sign of Jonah. What did he mean?? Christ then quoted from Jonah, and "For as Jonah was three days and three nights in the belly of the great fish, so will the Son of Man be three days and three nights in the heart of the earth." (Matthew 12:40 NKJV)
Another Scripture to consider is John 12:1, "Then Jesus six days before the passover came to Bethany...". Jesus was travelling from Jericho. If the crucifixion took place on Friday (which had to also be Passover), then this journey took place on the sabbath. Travelling that distance on the sabbath was legally out of the question for a devout Jew.
The nail in the coffin of the Friday crucifixion myth is the women buying spices after the sabbath. It is for this reason that the only solution is a Wednesday crucifixion. Wednesday at sunset to Saturday at sunset is 3 days and 3 nights.
They had to buy spices before they could prepare them - they rested on the High Sabbath of Feast of Unleavened Bread- Thursday - as no buying or selling was permitted. Then as scripture says they bought spices after the sabbath. [After the high sabbath, so they bought the spices and prepared them on Friday, and then rested on the weekly sabbath.
In the 1st century - the only light besides the sun and moon and stars was candles/ fire. Merchants would not travel and set up all their wares after dark on Saturday night after the weekly sabbath was over.
The Friday death / Sunday morning resurrection theory embraced by most of the Christian world does not make sense. In order to believe that theory, you are required to be unable to count to three, you must reject the evidence and testimony of Jesus and the Scriptures, and you must put your sensibilities aside."
http://www.bibletruth.cc/SignofJonah.htm
In order to be consistent in one's method of Biblical Interpretation - it would mean that Jonah was in the belly of the great fish for 1 day and a few hours. Does anyone credible Evangelical scholar believe that?? Of course not.
It would mean that the plain words of Jonah and Christ somehow don't mean what they plainly say.