That is what the Apostles were doing, gathering for a daily meal and continuing in discussion/midrash of that weeks teaching of Moses. (Acts 15:21)
God's Sabbath is from Friday sundown to Saturday sundown and since Messiah was put in the grave prior to sundown on Wed because Thurs was a High Holy Sabbath of Unleavened Bread and Scripture tells us that he raised “ON” the 3rd day, our Messiah raised on the Sabbath which is his day and why he is called the Master of the Sabbath. This is corroborated by Scripture as Mary, the mother of Messiah, kept the Sabbath Feast of Unleavened Bread, the next day she bought spices, then observed the weekly Sabbath and it was that evening after the weekly Sabbath had ended that they went on their way to the tomb. According to God's calendar, the new day dawns as sunset, not sunrise. Scripture says it was “dawning” towards the 1st of the week when they headed out to the tomb, which means the 1st day of the week had not actually come to be yet. It was still Saturday evening.
Isaiah 56 & 66 give the gentiles who wish to come into relationship with God specific instructions as to the Sabbath and not to profane it by doing as we please as well as guarding the commandments of God. In Mt 24, Messiah said to pray that our flight is not on the Sabbath. Now why would he say that if he did away with his Sabbath?
Also in other areas of Scripture where it says “first day of the week”, the 1st thing we must take note of is that the word “day” is in italics, which means it is an addition that is not found in any of the original texts. Second, the word week is “sabbaton” and if one takes the time to study the context, ALL of instances are found during the time after the weekly Sabbath immediately following Passover. This means the time is during the counting of the 7 Sabbaths leading up to Shavuot/Pentecost. Thus the proper rendering of these texts actually reads “one of the Sabbaths”.
Jesus was a Jewish Rabbi (teacher) and to say that his death ushered in change instead of the beginning of the restoration of his Father's House by first addressing the Father's authority which church fathers had usurped, is nothing but ignorance of an unstudied one of God's Word who twists the Words of Jesus as well as the Apostles to suit their own religious agenda that is in contradistinction to God's will for His people. (2 Pet 3:14-16)
The truth is, it was the council at Laodicea that made the Sabbath change. Interestingly enough, it is the church at Laodicea in Revelations 3 that Messiah says God is going to vomit out of his mouth. Why? Exodus 31:13; Eze 20:12 & 20. The 7th day Sabbath is the sign, the mark of God's people.
Rev 22:12 “And see, I am coming speedily, and My reward is with Me, to give to each according to his work. (See Mt. 16:27, John 5:29) 13 “I am the ‘Aleph’ and the ‘Taw’, (alpha & omega) the Beginning and the End, the First and the Last. 14 “Blessed are those doing His commands, so that the authority shall be theirs unto the tree of life, and to enter through the gates into the city. (See Mt. 19:17. Long before the books were compiled to form “The New Testament,” Rev. 22:14 was quoted, as it is here given, by Tertullian (CE 208), and by Cyprian (CE 251) – see the well-known Antenicene Fathers) 15 “But outside are the dogs and those who enchant with drugs, and those who whore, and the murderers, and the idolaters, and all who love and do falsehood.”
John 1:1 in the beginning was the Word .... 14 the Word put on flesh
If the Word has been from the beginning, the it was the Word who gave all the commands of God to Moses. Scripture says that God will raise up a prophet like Moses (Dt 18) who will speak only the Words the Father gives him (John 7:16 & John 14:24). Therefore it is the reason the Word of God spoke to Moses in Exodus 19:9 that God's children would believe all that was spoken through Moses, FOREVER! (Mt 23:1-3, John 5:46 & John 14)
As a final note, love God with all your heart & love they neighbor are not found anywhere in Exodus, they are found in Lev 19 & Dt 6. Long after the 10 commandments were given and the tabernacle was built. A great explanation of their context can be found by reading the Epistle of 1 John wherein John expounds on what the definition of "love" according to God is.
There is "one" house, there is "one" Shepard and there is only "one" type of people who will enter His house. (Dt 8:2-6 & Dt 10:12-13). Those who fear God and submit to His authority while in the flesh. Nearly 3 million people left Egypt but only 2 of them, Caleb & Joshua made it to the promised land. God says His people are a remnant and that throughout all time, there has always been a remnant of true believers of Messiah (Heb 11).
God's message is clear and His house is for all, native, eunuch and gentile who have it in their hearts to humble themselves, pick up their stake and walk as Jesus walked knowing that when we stumble, we are saved through the blood of the lamb, our Messiah, the only begotten Son & Word of God who is the same yesterday, today & forever. From the beginning of creation through eternity. (Mt 5:17-20, Heb 13:8-9, Dt 13)
According to God’s calendar, the new day dawns as sunset, not sunrise. Scripture says it was “dawning” towards the 1st of the week when they headed out to the tomb, which means the 1st day of the week had not actually come to be yet. It was still Saturday evening.
The new day started after sundown but the dawning did not start until just before sunup
New International
After the Sabbath, at dawn on the first day of the week, Mary Magdalene and the other Mary went to look at the tomb.
New Living Translation
Early on Sunday morning, as the new day was dawning, Mary Magdalene and the other Mary went out to visit the tomb.
English Standard Version
Now after the Sabbath, toward the dawn of the first day of the week, Mary Magdalene and the other Mary went to see the tomb.
New American Standard Bible
Now after the Sabbath, as it began to dawn toward the first day of the week, Mary Magdalene and the other Mary came to look at the grave.
King James Bible
In the end of the sabbath, as it began to dawn toward the first day of the week, came Mary Magdalene and the other Mary to see the sepulchre.