Is the seventh day a day of worship or a day of rest?
Leviticus 23:1-3 MKJV
(1) And Jehovah spoke to Moses, saying,
(2) Speak to the sons of Israel and say to them, The feasts of Jehovah, which you shall proclaim, holy convocations, even these are My appointed feasts.
(3) Six days shall work be done, but the seventh day is the sabbath of rest, a holy convocation. You shall not do any work. It is a sabbath to Jehovah in all your dwellings.
Whatever your argument against the Sabbath, it is eternally written (Matthew 5:17-18) that there is a call to gather for a holy convocation on it. That call was heeded in Israel and outside of Zion.
Acts 13:13-15 MKJV
(13) And Paul and those around him sailed from Paphos and came to Perga of Pamphylia. And John left them and returned to Jerusalem.
(14) But going through from Perga, they came to Antioch in Pisidia and went into the synagogue on the sabbath day and sat down.
(15) And after the reading of the Law and the Prophets, the rulers of the synagogue sent to them, saying, Men, brothers, if you have any word of comfort for the people, speak.
So, the Sabbath was not kept only within the gates of Jerusalem or in Israel as the detractors of the Sabbath claim. Elsewhere, I mentioned that Isaiah 56 makes the Sabbath a day that every man should keep because it pleases God a lot and that God welcomes and favors any pagan who would join the chosen people to keep it. As such can there be anyone who can convert to God but declare 'The Sabbath is not for me."? Isaiah 56 gives the answer because God expects the converted to do what pleases Him. If we affiliate ourselves with God but reject His Sabbath, we are not really affiliated with God, as Isaiah 56 implies.
The Sabbath day happens to be the seventh day and God consecrated it holy and calls for a holy convocation on it.
Does calling for a holy convocation on the seventh day make the seventh day THE worship day?
The seventh day had never been a worship day because God calls for a holy convocation on it. There were other days in the Hebrew calendar days when a holy convocation and no servile work were mandated. That did not make those dates 'the sabbath day'.
To wit, in Leviticus 23, there are other sabbath days which could fall any day of the week, in which a holy convocation is also called for. They were all sabbath (no servile work done) and worship days (holy convocation).
Exodus 12:16 KJV
And in the first day there shall be an holy convocation, and in the seventh day there shall be an holy convocation to you; no manner of work shall be done in them, save that which every man must eat, that only may be done of you.
Leviticus 23:3 KJV
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.
Leviticus 23:7 KJV
In the first day ye shall have an holy convocation: ye shall do no servile work therein.
Leviticus 23:8 KJV
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.
Leviticus 23:21 KJV
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.
Leviticus 23:24 KJV
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.
Leviticus 23:27 KJV
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.
Leviticus 23:35 KJV
On the first day shall be an holy convocation: ye shall do no servile work therein.
Leviticus 23:36 KJV
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.
Numbers 28:18 KJV
In the first day shall be an holy convocation; ye shall do no manner of servile work therein:
Numbers 28:25 KJV
And on the seventh day ye shall have an holy convocation; ye shall do no servile work.
Numbers 28:26 KJV
Also in the day of the firstfruits, when ye bring a new meat offering unto the LORD, after your weeks be out, ye shall have an holy convocation; ye shall do no servile work:
Numbers 29:1 KJV
And in the seventh month, on the first day of the month, ye shall have an holy convocation; ye shall do no servile work: it is a day of blowing the trumpets unto you.
Numbers 29:7 KJV
And ye shall have on the tenth day of this seventh month an holy convocation; and ye shall afflict your souls: ye shall not do any work therein:
Numbers 29:12 KJV
And on the fifteenth day of the seventh month ye shall have an holy convocation; ye shall do no servile work, and ye shall keep a feast unto the LORD seven days:
As you might understand, the seventh day is not a day of worship because a holy convocation and no servile work was called for the day. As we can gather in the verses cited, holy convocation and no servile work were mandated on other random Sabbath-like holy days and on Pentecostal Sunday. Yet, the recurring annual Pentecostal Sunday, a Sabbath and worship day, was not made the new Sabbath day by the Jews because the Sabbath day is defined as the seventh day.
Attempting to abolish the Sabbath on the ground of worship day has no merit whatsoever because, again, the seventh day or the Sabbath day is not a day of worship.
Now that you might understand Sabbaths in plural (the 7 Sabbaths that lead to Pentecostal or fiftieth day), you might be able to also understand that the Sabbath day also witnesses to the resurrection of Jesus as we read in Matthew 24:1 of the Literal Version of the Bible:
Can you now understand the verses below in relation to the plural sabbaths?: Leviticus 23 lists the plural sabbaths in question.
1 Corinthians 16:2 LITV
On one of the sabbaths, let each of you put by himself, storing up whatever he is prospered, that there not be collections then when I come.
Colossians 2:16 LITV
Then do not let anyone judge you in eating, or in drinking, or in part of a feast, or of a new moon, or of sabbaths,
Leviticus 23:15-22 ASV
(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 there be complete: (16) even unto the morrow after the seventh sabbath shall ye number fifty days; and ye shall offer a new meal-offering unto Jehovah. (17) Ye shall bring out of your habitations two wave-loaves of two tenth parts of an ephah: they shall be of fine flour, they shall be baken with leaven, for first-fruits unto Jehovah. (18) And ye shall present with the bread seven lambs without blemish a year old, and one young bullock, and two rams: they shall be a burnt-offering unto Jehovah, with their meal-offering, and their drink-offerings, even an offering made by fire, of a sweet savor unto Jehovah. (19) And ye shall offer one he-goat for a sin-offering, and two he-lambs a year old for a sacrifice of peace-offerings. (20) And the priest shall wave them with the bread of the first-fruits for a wave-offering before Jehovah, with the two lambs: they shall be holy to Jehovah for the priest. (21) And ye shall make proclamation on the selfsame day; there shall be a holy convocation unto you; ye shall do no servile work: it is a statute for ever in all your dwellings throughout your generations. (22) And when ye reap the harvest of your land, thou shalt not wholly reap the corners of thy field, neither shalt thou gather the gleaning of thy harvest: thou shalt leave them for the poor, and for the soujourner: I am Jehovah your God.