Saturday originally never had anything to do with sacrifice, it was a day of rest.
The early Christians held service on the first day of the week for two reasons,
1 in respect of the Sabbath.
2 in honor of the resurrection.
We can worship any day, we can rest any day.
Yes every day is a Sabbath but not the Sabbath
God rested on the seventh day, he called it the Sabbath it is history.
So we agree that every day can be a Sabbath, but the ones calling Sunday the Sabbath are still under the same law but just using a false Sabbath.
The Sabbath of the pagans.
The day that saw the conquest of death and the fulfillment of the scriptures by God made man is the Sabbath of the New Covenant, shifting the focus to our final rest in Christ through His sacrifice.
To insist that Saturday is the proper sabbath is to insist that Christ did not fulfill the law.
***Saturday originally never had anything to do with sacrifice, it was a day of rest.***
WRONG! Sacrifices were offered every day, including the Sabbath!
NUMBERS 28:
9 And on the sabbath day two lambs of the first year without spot, and two tenth deals of flour for a meat offering, mingled with oil, and the drink offering thereof:
10 This is the burnt offering of every sabbath, beside the continual burnt offering, and his drink offering.
Matthew 12:
5 Or have ye not read in the law, how that on the sabbath days the priests in the temple PROFANE THE SABBATH, and are blameless?
6 But I say unto you, That in this place is one greater than the temple.
7 But if ye had known what this meaneth, I will have mercy, and not sacrifice, ye would not have condemned the guiltless.
8 For the Son of man is Lord even of the sabbath day.
The answer must be true to the New Covenant in Christ which frees us from the law. We are convicted by the law but justified by faith.
Jesus Christ is our Sabbath. We find our rest in him. Any other Sabbath is pagan.