Col 2:16-17 So let no one judge you in food or in drink, or regarding a festival or a new moon or sabbaths, which are a shadow of things to come, but the substance is of Christ.
Since all these feasts are just a shadow of things to come, let's see how Christ Jesus will fulfill them.
Feasts Already Fulfilled
The Feast of Unleavened Bread
Exo 23:15a You shall keep the Feast of Unleavened Bread (you shall eat unleavened bread seven days, as I commanded you, at the time appointed in the month of Abib).
On the eve of the feast the lamb was slaughtered, which was fulfilled by Jesus the lamb of God crucified for the propitiation of men's sin. This Feast was fulfilled when the Word was made flesh to be the Bread of life. We must keep His words.
Feast of Harvest of Firstfruits
Exo 23:16a and the Feast of Harvest, the firstfruits of your labors which you have sown in the field;
After the Passover, the first harvest of the ripen barley ou.t of the earth, will be an offering to the Lord. This was fulfilled by the resurrection of our Lord on the third day. The Feast of Harvest of Firstfruits was fulfilled by the outpouring of the Holy Spirit to all His disciples at Pentecost.
Feasts to be Fulfilled
Seventh Month's Feasts
1. Blowing of Trumpets
Lev 23:24 "Speak to the children of Israel, saying: 'In the seventh month, on the first day of the month, you shall have a sabbath-rest, a memorial of blowing of trumpets, a holy convocation."
This will be fulfilled at Rapture, which also ends the period of grace for the Gentiles.
Mat 24:31 And He will send His angels with a great sound of a trumpet, and they will gather together His elect from the four winds, from one end of heaven to the other.
2. Day of Atonement
Lev 23:27 "Also the tenth day of this seventh month shall be the Day of Atonement. It shall be a holy convocation for you; you shall afflict your souls, and offer an offering made by fire to the Lord."
This will be fulfilled when the remnant of Israel will mourn, repent, believe and accept our Lord Jesus as their Messiah (the One they pierced) and then all Israel will be saved.
Zech 12:10 "And I will pour on the house of David and on the inhabitants of Jerusalem the Spirit of grace and supplication; then they will look on Me whom they pierced. Yes, they will mourn for Him as one mourns for his only son, and grieve for Him as one grieves for a firstborn.
3. Feast of Tabernacle
Lev 23:34 "Speak to the children of Israel, saying: 'The fifteenth day of this seventh month shall be the Feast of Tabernacles for seven days to the Lord.
This will be fulfilled when our Lord Jesus comes down to establish His Millennium Rule on earth
Rev 20:6b, but they shall be priests of God and of Christ, and shall reign with Him a thousand years.
4. Eighth day Sabbath-rest
Lev 23:39 'Also on the fifteenth day of the seventh month, when you have gathered in the fruit of the land, you shall keep the feast of the Lord for seven days; on the first day there shall be a sabbath-rest, and on the eighth day a sabbath-rest.
The eighth day sabbath-rest, possibly signifying the beginning of the eighth Millennium will be fulfilled by the New Heaven and New Earth and then eternity.
Heb 8:13 In that He says, "A new covenant," He has made the first obsolete. Now what is becoming obsolete and growing old is ready to vanish away.
God specifically warned us not to follow these Jewish feasts which are only used to show the things to come.