The history of how Sunday worship came about

[rockytopva]

The history of how Sunday worship came about? How about...

And very early in the morning the first day of the week, they came unto the sepulchre at the rising of the sun. - Mark 16:2

Then the same day at evening, being the first day of the week, when the doors were shut where the disciples were assembled for fear of the Jews, came Jesus and stood in the midst, and saith unto them, Peace be unto you. - John 20:19

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. - Acts 20:7

Upon the first day of the week let every one of you lay by him in store, as God hath prospered him, that there be no gatherings when I come. - 1 Corinthians 16:2

 

[JohnDB]

And exactly which day of the week is the first?
Is it important which day is first?
Do the old calendars matter? Which ones? Leveritical or Civil?

Are we really sure that Sunday of today's age is the same Sunday/Day of the week that Paul and Luke talked about?

(All of these are loaded questions...be very careful with your answers)