Acts 20:7 On the first day of the week, when we were gathered together to break bread, Paul began talking to them, intending to leave the next day, and he prolonged his message until midnight.
1 Cor. 16:2 On the first day of every week each one of you is to put aside and save, as he may prosper, so that no collections be made when I come.
"gathered together to break bread" means that they were keeping the Lord's Supper (Luke 22:19)
I am not quoting these scriptures to attack the Sabbath, but to disagree with the statement that Sunday worship is manmade.
I also believe that Jesus rose early on Sunday morning.
there is more than one way to read break bread...
Barclay's has this...
It talks twice about breaking of bread. In the early Church there were two closely related things. One was what was called the Love Feast. To it all contributed and it was a real meal, often the only proper meal that poor slaves got all week. Here Christians ate in loving fellowship with each other. The other was the Lord's Supper which was observed during or immediately after the Love Feast. It may well be that we have lost something of great value in the happy togetherness of the common meal. It marked as nothing else could the family spirit of the Church.
Bullinger's has...
break bread. See note on Act_2:42.
OK the note on Acts 2:42...
breaking of bread. This was the common meal. Compare verses:##Act_44:46 and Mat_14:19. Isa_58:7.
Adam Clarke...
To break bread - To break eucaristia, the eucharist, as the Syriac has it; intimating, by this, that they were accustomed to receive the holy sacrament on each Lord’s day. It is likely that, besides this, they received a common meal together. Some think the αγαπη, or love feast, is intended.
Opinions differ.
As far as the first day of the week?
Act 20:7 Now on the first
day of the week, when the disciples came together to break bread, Paul, ready to depart the next day, spoke to them and continued his message until midnight.
Let's see what it really was...
The word for first here is...
G3391
μία
mia
mee'-ah
Irregular feminine of G1520; one or first: - a (certain), + agree, first, one, X other.
And means "first". Now the word for "of the" (notice that day is italicised? Means it is not in the orginals)
G3588
ὁ, ἡ, τό
ho hē to
ho, hay, to
The masculine, feminine (second) and neuter (third) forms, in all their inflections; the definite article; the (sometimes to be supplied, at others omitted, in English idiom): - the, this, that, one, he, she, it, etc.
Means "of the". Now for the word that translated week...
G4521
σάββατον
sabbaton
sab'-bat-on
Of Hebrew origin [H7676]; the Sabbath (that is, Shabbath), or day of weekly repose from secular avocations (also the observance or institution itself); by extension a se'nnight, that is, the interval between two Sabbaths; likewise the plural in all the above applications: - sabbath (day), week.
Means "Sabbath". So what does Acts 20:7 really say? The Diaglott does a good job here...
Act 20:7 In and the first of the sabbaths, having been assembled of us to break bread, the Paul discoursed to them, being about to depart on the morrow; continued and the discourse till midnight.
What is the first of the Sabbaths?
Again, from Bullinger's...
first, &c. = first day of the sabbaths, i.e. the first day for reckoning the seven sabbaths to Pentecost. It depended upon the harvest (Deu_16:9), and was always from the morrow after the weekly sabbath when the wave sheaf was presented (Lev_23:15). In Joh_20:1 this was the fourth day after the Crucifixion, "the Lord's Passover. "Compare App-156. This was by Divine ordering. But in A.D. 57 it was twelve days after the week of unleavened bread, and therefore more than a fortnight later than in A.D. 29.
What are these Sabbaths that this was the first of?
Lev 23:15 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:
Lev 23:16 Even unto the morrow after the seventh sabbath shall ye number fifty days; and ye shall offer a new meat offering unto the LORD.
This was the first Sabbath in the counting of seven Sabbaths to determine Pentecost. Wasn't a "Sunday go to meetin'" after all.