Shalom, the laws that pertain to ceremonies in Israel differ only somewhat today under the New Covenant than before concerning the ceremonies that were under the Levitical Order(Old Covenant). Now the only adjustments that differ under the New Covenant are the laws of "sacrifice" "temple laws" and the "Levitical Order" itself. Meaning we still keep the Sabbaths including the Holy Days, 7th day Sabbath, and Feast Days, we just do it without offering sacrifices. If you read the book of Leviticus you will see that the Levites were set up to be the priests that would offer sacrifices during Sabbaths and for the sins of the Israelites. This order had to be practiced a specific way to be accepted by YHWH(GOD) however this did not make us more perfect and TMH no longer accepted it.
"For the law having a shadow of good things to come, and not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect.
2 For then would they not have ceased to be offered? because that the worshippers once purged should have had no more conscience of sins.
3 But in those sacrifices there is a remembrance again made of sins every year.
4 For it is not possible that the blood of bulls and of goats should take away sins.
5 Wherefore when he cometh into the world, he saith, Sacrifice and offering thou wouldest not, but a body hast thou prepared me:
6 In burnt offerings and sacrifices for sin thou hast had no pleasure." Hebrews 10:1-5
We will attempt to explain this as plainly as possible. Under the New Covenant Christ came so that we could repent of our sins(formerly done through the levitical priest) and he died so that our sins would be forgiven (we used to sacrifice animals for sin). So now when we repent and turn from our wickedness we do it in the name of Christ, meaning he is the sacrifice used now instead of the sin offerings used under the Old Covenant.
Now you may ask, "why do we have to keep the Holy Days and Sabbath and such under the New Covenant didn't Christ do away with the law"?? That is simple, NO HE DID NOT. Christ did not come to destroy the Law given to the Israelites he came to fulfill the Laws pertaining to sacrifice under the Levitical Order. We are commanded to keep the law period, that will never change.
"Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfill." Matthew 5:17
READ LEVITICUS 23 BELOW TO UNDERSTAND THE LAWS THAT PERTAIN TO OUR CEREMONIES/FESTIVALS(SIMPLY SUBTRACT THE SACRIFICES GIVEN AND THAT'S ALL)
"And the Lord spake unto Moses, saying,
2 Speak unto the children of Israel, and say unto them, Concerning the feasts of the Lord, which ye shall proclaim to be holy convocations, even these are my feasts.
3 Six days shall work be done: but the seventh day is the sabbath of rest, an holy convocation; ye shall do no work therein: it is the sabbath of the Lord in all your dwellings.
4 These are the feasts of the Lord, even holy convocations, which ye shall proclaim in their seasons.
5 In the fourteenth day of the first month at even is the Lord's passover.
6 And on the fifteenth day of the same month is the feast of unleavened bread unto the Lord: seven days ye must eat unleavened bread.
7 In the first day ye shall have an holy convocation: ye shall do no servile work therein.
8 But ye shall offer an offering made by fire unto the Lord seven days: in the seventh day is an holy convocation: ye shall do no servile work therein.
9 And the Lord spake unto Moses, saying,
10 Speak unto the children of Israel, and say unto them, When ye be come into the land which I give unto you, and shall reap the harvest thereof, then ye shall bring a sheaf of the firstfruits of your harvest unto the priest:
11 And he shall wave the sheaf before the Lord, to be accepted for you: on the morrow after the sabbath the priest shall wave it.
12 And ye shall offer that day when ye wave the sheaf an he lamb without blemish of the first year for a burnt offering unto the Lord.
13 And the meat offering thereof shall be two tenth deals of fine flour mingled with oil, an offering made by fire unto the Lord for a sweet savour: and the drink offering thereof shall be of wine, the fourth part of an hin.
14 And ye shall eat neither bread, nor parched corn, nor green ears, until the selfsame day that ye have brought an offering unto your God: it shall be a statute for ever throughout your generations in all your dwellings.
15 And ye shall count unto you from the morrow after the sabbath, from the day that ye brought the sheaf of the wave offering; seven sabbaths shall be complete:
16 Even unto the morrow after the seventh sabbath shall ye number fifty days; and ye shall offer a new meat offering unto the Lord.
17 Ye shall bring out of your habitations two wave loaves of two tenth deals; they shall be of fine flour; they shall be baken with leaven; they are the firstfruits unto the Lord.
18 And ye shall offer with the bread seven lambs without blemish of the first year, and one young bullock, and two rams: they shall be for a burnt offering unto the Lord, with their meat offering, and their drink offerings, even an offering made by fire, of sweet savour unto the Lord.
19 Then ye shall sacrifice one kid of the goats for a sin offering, and two lambs of the first year for a sacrifice of peace offerings.
20 And the priest shall wave them with the bread of the firstfruits for a wave offering before the Lord, with the two lambs: they shall be holy to the Lord for the priest.
21 And ye shall proclaim on the selfsame day, that it may be an holy convocation unto you: ye shall do no servile work therein: it shall be a statute for ever in all your dwellings throughout your generations.
22 And when ye reap the harvest of your land, thou shalt not make clean riddance of the corners of thy field when thou reapest, neither shalt thou gather any gleaning of thy harvest: thou shalt leave them unto the poor, and to the stranger: I am the Lord your God.
23 And the Lord spake unto Moses, saying,
24 Speak unto the children of Israel, saying, In the seventh month, in the first day of the month, shall ye have a sabbath, a memorial of blowing of trumpets, an holy convocation.
25 Ye shall do no servile work therein: but ye shall offer an offering made by fire unto the Lord.
26 And the Lord spake unto Moses, saying,
27 Also on the tenth day of this seventh month there shall be a day of atonement: it shall be an holy convocation unto you; and ye shall afflict your souls, and offer an offering made by fire unto the Lord.
28 And ye shall do no work in that same day: for it is a day of atonement, to make an atonement for you before the Lord your God.
29 For whatsoever soul it be that shall not be afflicted in that same day, he shall be cut off from among his people.
30 And whatsoever soul it be that doeth any work in that same day, the same soul will I destroy from among his people.
31 Ye shall do no manner of work: it shall be a statute for ever throughout your generations in all your dwellings.
32 It shall be unto you a sabbath of rest, and ye shall afflict your souls: in the ninth day of the month at even, from even unto even, shall ye celebrate your sabbath.
33 And the Lord spake unto Moses, saying,
34 Speak unto the children of Israel, saying, The fifteenth day of this seventh month shall be the feast of tabernacles for seven days unto the Lord.
35 On the first day shall be an holy convocation: ye shall do no servile work therein.
36 Seven days ye shall offer an offering made by fire unto the Lord: on the eighth day shall be an holy convocation unto you; and ye shall offer an offering made by fire unto the Lord: it is a solemn assembly; and ye shall do no servile work therein.
37 These are the feasts of the Lord, which ye shall proclaim to be holy convocations, to offer an offering made by fire unto the Lord, a burnt offering, and a meat offering, a sacrifice, and drink offerings, every thing upon his day:
38 Beside the sabbaths of the Lord, and beside your gifts, and beside all your vows, and beside all your freewill offerings, which ye give unto the Lord.
39 Also in the fifteenth day of the seventh month, when ye have gathered in the fruit of the land, ye shall keep a feast unto the Lord seven days: on the first day shall be a sabbath, and on the eighth day shall be a sabbath.
40 And ye shall take you on the first day the boughs of goodly trees, branches of palm trees, and the boughs of thick trees, and willows of the brook; and ye shall rejoice before the Lord your God seven days.
41 And ye shall keep it a feast unto the Lord seven days in the year. It shall be a statute for ever in your generations: ye shall celebrate it in the seventh month.
42 Ye shall dwell in booths seven days; all that are Israelites born shall dwell in booths:
43 That your generations may know that I made the children of Israel to dwell in booths, when I brought them out of the land of Egypt: I am the Lord your God.
44 And Moses declared unto the children of Israel the feasts of the Lord."
Remember Christ himself kept the Passover, Sabbath, Feast of Dedication, etc. Paul instructed even the scattered(diaspora) to keep the Feasts, and the Apostles themselves kept the Feasts including (Pentecost) and the "fast" (Day of Atonement)..
We MUST still observe the Sabbath, Holy Days, Feast Days, and New Moons(new months). You can go to our Holy Days Page for more information pertaining to how to observe Ceremonial Laws like no working, buying, selling, convocation etc...
Below are some scriptures that will prove Christ and the Apostles were observing and instructing us to observe our Israelite ceremonies/feasts EVEN under the New Covenant because they understood the law was not gone it was simply fulfilled as it pertained to sacrifice.
"And it was at Jerusalem the feast of the dedication, and it was winter.
23 And Jesus walked in the temple in Solomon's porch." John 10:22-23
"Now his parents went to Jerusalem every year at the feast of the Passover. 42 And when he was twelve years old, they went up to Jerusalem after the custom of the feast. " Luke 2:41-42
"Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth." 1st Corinthians 5:8
"And when the day of Pentecost was fully come, they were all with one accord in one place." Acts 2:1
"Now the feast of unleavened bread drew nigh, which is called the Passover." Luke 22:1
“Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city.” Revelation 22:14
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