The new Testament does speak of the Church gathering on the First day of the week [Sunday].
Acts 20:7 And upon the first day of the week, when the disciples came together to break bread, Paul preached unto them, ready to depart on the morrow; and continued his speech until midnight.
Scripture also tells us:
Colossians 2:13-20
13. And you, being dead in your sins and the uncircumcision of your flesh, hath he quickened together with him, having forgiven you all trespasses;
14. Blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to his cross;
15. And having spoiled principalities and powers, he made a shew of them openly, triumphing over them in it.
16. Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days:
17. Which are a shadow of things to come; but the body is of Christ.
18. Let no man beguile you of your reward in a voluntary humility and worshipping of angels, intruding into those things which he hath not seen, vainly puffed up by his fleshly mind,
19. And not holding the Head, from which all the body by joints and bands having nourishment ministered, and knit together, increaseth with the increase of God.
20. Wherefore if ye be dead with Christ from the rudiments of the world, why, as though living in the world, are ye subject to ordinances,
Interesting is it not?
Well it's interesting how neither of these passages are commands authorizing the observance of the first day.
The disciples broke bread daily:
Act 2:46 And they, continuing daily with one accord in the temple, and breaking bread from house to house, did eat their meat with gladness and singleness of heart
As for the commandments contained in ordinances, these were added to prepare the people for the FIRST arrival of Messiah. They showed their faith in the coming Messiah by keeping the ordinances. And when Jesus died on the cross the ordinances were no longer needed because he fulfilled them all. But what are these ordinances? Colossians 2:14-17 says... "Blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to his cross; And having spoiled principalities and powers, he made a shew of them openly, triumphing over them in it. Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days: Which are a shadow of things to come; but the body is of Christ."
The "ordinances" were a series of laws that Moses penned to prepare the people for the "things to come". The "ordinaces" are no different than the ordinances of small towns and cities where they only apply up to city limits. The Ten Coommandments can be compared to the Constitution of the United States, and the ordinances are the local laws of the cities. Fact is, the word "ordinance" is NOT the same as the word "commandment" is it? Plus, did you notice that in verse 16 it states, "...Let no man therefore judge you in meat, or in drink..." The word "therefore" denotes that it is speaking of the previous topic of the ordinances. So, I ask, WHERE in the TEN COMMANDMENTS does it speak of "meat and drink?" Nowhere! The ceremonial law talks volumes on meat and drink, but the Law of God does not. So, it is impossible that the "ordinances" and the commandments are the same thing.
Also notice that nowhere in the Ten Commandments do we see any mention of, "holydays or new moons" as this passage declares is part of the "ordinances." The Old Testament people were just as much believers in Jesus as the New Testament people. The obvious difference is they looked FORWARD to Jesus coming the first time. We await His second coming today. All the "meat, drink, holy days, & sabbaths" were all abolished at the cross, because Jesus fulfilled their purpose perfectly.
And by the way... the "sabbaths" mentioned here are not the weekly Sabbath of God Almighty. This passage calls these "sabbath days" (plural) as a "shadow of things to come." The weekly Sabbath (singular) of the Lord can in no way be a shadow of something future. The "shadowy" things appeared AFTER sin came into the world. It was a way to deliverance from sin. All the "shadowy things" pointed forward to the arrival of Jesus as Saviour to the cross as an offering for sin. It was after sin started that the Lord declared these shadows were necessary for man to perform. These sabbaths were to be an evidence that the people believed the Messiah would come to permanently wash away their sins. But the weekly 7th day Sabbath was instituted IN EDEN, before sin entered the world. In other words, the annual sabbaths pointed FORWARD to a future event. The Seventh Day Sabbath points backwards to the ultimate event. Creation. It denotes a REMEMBRANCE of the work of Creation. And when we keep that Sabbath holy, we "remember" Him as our Creator.
Read Leviticus 23:24-38 and you will find that the sabbaths mentioned in Colassians chapter 2 are the "annual sabbaths" that acknowledged certain events. Make special note that it even says in Verse 38 of Leviticus 23 that these annual sabbaths are BESIDES the Sabbath of the Lord. Jesus said Himself... "Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil." Matthew 5:17 The simplest way I know to explain it is. The children of God were symbolically keeping the ordinances in the past looking forward to Jesus where He would actually fulfill them in reality. (Notice the "sabbaths" of Leviticus...Count them and you will find they come too frequently to be considered WEEKLY Sabbaths )
Leviticus 23:23-38, "And the LORD spake unto Moses, saying, Speak unto the children of Israel, saying, In the seventh month, in the first day of the month, shall ye have a sabbath, (sabbath #1 day #1) a memorial of blowing of trumpets, an holy convocation. Ye shall do no servile work therein: but ye shall offer an offering made by fire unto the LORD. And the LORD spake unto Moses, saying, 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. 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. For whatsoever soul it be that shall not be afflicted in that same day, he shall be cut off from among his people. And whatsoever soul it be that doeth any work in that same day, the same soul will I destroy from among his people. Ye shall do no manner of work: it shall be a statute for ever throughout your generations in all your dwellings. It shall be unto you a sabbath of rest, (sabbath #2 day# 10) and ye shall afflict your souls: in the ninth day of the month at even, from even unto even, shall ye celebrate your sabbath.(sabbath #3 day #9) And the LORD spake unto Moses, saying, 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. On the first day shall be an holy convocation: ye shall do no servile work therein.(sabbath #4 day #15) 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.(sabbath #5 day #8) 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: 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."
FIVE "sabbaths" that are defined as "feast days" of the Lord within a 15 day period, and again, that's BESIDES the weekly Sabbath of the Lord. The Lord is rather blunt here. He is listing 5 "sabbath days" that fall on certain "days of the 7th month" that will actually fall on different days of the week every year. And then He makes special note that we understand these to be BESIDES the Sabbath of the Lord in verse 38. And did you also notice the meat and drink offerings mentioned in Leviticus? This absolutely confirms that they are the same thing that is being spoken of in Colossians 2:14-17. Fact is, IF this "law contained in ordinances" is the same as the "Law contained in stone" then I ask for all those reading to share with me the commandment that is written within the Ten Commandments that speaks of "meat and drink" offerings. Biblical fact is...
Hebrews 9:1,10 "Then verily the first covenant had also ordinances of divine service, and a worldly sanctuary. Which stood only in meats and drinks, and divers washings, and carnal ordinances, imposed on them until the time of reformation."
One more point must be stressed here. It stated this in Colossians 2:17, "...Which are a shadow of things to come; but the body is of Christ" Let me ask you this... when I stand in front of a light source I cast a shadow correct? Now, if you find that shadow I cast and follow it you will eventually come to my body, correct? Does my shadow continue on behind me? No, it stops at the body does it not? All those feast days are shadows of things that Jesus did in reality. When you follow those shadows you will eventually come to rest before the body of Jesus Christ on the cross. There is no shadow beyond the cross. the "ordinances" were nailed to that cross. He did EXACTLY as those shadows depicted He was to do.