Thanks, Harmonious.
First, in the farming community, the first fruits of a harvest refer to any kind of harvest. . .it doesn't have to be fruit.
Hmm...
Now, I'm getting curious if you are REALLY interested in this, or if you are just working to drag my head.
Leviticus legislates three harvest feasts, the first two at which offerings of the first fruits of harvest were to be made.
1) first fruits of barley harvest - Nisan 16, spring
2) first fruits of wheat harvest - Feast of Weeks - Sivan 6, summer (Ex 34:22)
3) celebration of wheat and fruit (grape) harvest - Feast of Tabernacles - Tishri 15-21 - fall (Deut 17:13)
You know, Smoky, it helps to know how these countings correlate to commandments that Jews had to (and still) carry out. That way, they aren't just abstract verses that have no real meaning.
On Nissan 16, it wasn't a festival. It was a time of counting. According to Jewish law, because of the verses you pointed out, Jews are not allowed to eat "new" grain, or grain harvested after Nissan 16, until it is a year old. (This is particularly important in Israel, but Jewish farmers in America have decided to make it work, here.)
I don't know if you have seen signs in Jewish neighborhoods, saying "We sell Yashan," or "We sell Yoshon". It refers to grains being counted and timed in this fashion, from year to year. That is what this is referring to.
As far as the First Fruits... It was a gift that was brought to the Cohanim. (You see, they didn't have land, and otherwise couldn't sustain themselves. The gifts that God directed the Jews to give the Cohanim is how they could count on sustenance.)
In addition to simply bringing that gift of first fruit, it came with a declaration, that Jews had to make. That declaration is in Deuteronomy, 26:5-10:
5. And you shall call out and say before the Lord, your God, "An Aramean [sought to] destroy my forefather, and he went down to Egypt and sojourned there with a small number of people, and there, he became a great, mighty, and numerous nation.
6. And the Egyptians treated us cruelly and afflicted us, and they imposed hard labor upon us.
7. So we cried out to the Lord, God of our fathers, and the Lord heard our voice and saw our affliction, our toil, and our oppression.
8. And the Lord brought us out from Egypt with a strong hand and with an outstretched arm, with great awe, and with signs and wonders.
9. And He brought us to this place, and He gave us this land, a land flowing with milk and honey.
10. And now, behold, I have brought the first of the fruit of the ground which you, O Lord, have given to me." Then, you shall lay it before the Lord, your God, and prostrate yourself before the Lord, your God.
And for the Jews (and perhaps Noachides) reading along, that these verse I listed should sound familiar. They are, because these verses that are expounded upon in the Passover Haggadah. This paragraph is expounded upon, because it is a first person declaration of having the need to GO to Egypt, to have the need to be saved.
And Sukkot, the Feast of Tabernacles, is something different altogether.
Second, I'm not convinced that after the destruction of Jerusalem about 35 years after Jesus was crucified, the later restoration of the feasts was not somewhat abbreviated
--a) to just one celebration, of the fruit harvest on Sivan 6, which was really the date for the second first fruits of the wheat harvest in the summer,
--b) instead of celebrating the two feasts of first fruits, where the first was on Nisan 16, at the barley harvest in the spring, and instead of
--c) celebrating the two harvests of wheat and fruit (grape) in the fall on Tishri 15-21.
That's not really so surprising, as you have no idea WHAT those dates were and how they were at all relevant to Jewish life. Therefore, you don't understand that these "feasts" were NOT abbreviated. You just don't know what they were.
You never celebrated them, or applied the dates to your own life, or really had need to. The only thing you really use them for is attempting to figure out the days when Jesus died, because the authors of the gospels were using terms that they figured would sound good to audiences who didn't know better.
I, who apply said laws to my life, understand what they once were, and hope they will be again.
I'm not convinced the restored practices were identical to those during the life of Jesus.
That being the case, the gospel accounts may not be able to be reconciled with the Jewish practices of today, and will have to be sorted out on their own terms,
instead of in terms of current Jewish practice. That is the way I will proceed.
Proceed as you will.
I just told you what the dates in Jewish law are. You can choose to ignore what I've said, as you will. But if you really want to know the significance of the above dates to Jews, both in Jesus' time and now, you would heed what I've said.
If you choose to ignore it, you are free to live in the fantasy land that you've created for yourself that has nothing at all to do with how Jews lived, now, then, or at any other time.