It’s pretty simple. The commandment designates Saturday as the day of worship, and nothing in the scripture ever changed that.
Constantine changed it because he wanted to unify the Christian and pagan worlds under Rome.
You can believe God or you can believe Constantine, but those are the facts.
Absolutely false. The writings of the first Christians show that it was changed during apostolic times and has been the tradition of the Church since then...well before Constantine.
Why then didn't the earliest Christian churches do that then. They met on the morning of the first day of the week and then regathered after work and had the Lord's Supper.
Constantine changed it because he wanted to unify the Christian and pagan worlds under Rome.
When the Roman aristocrats began to dominate the Christian churches in Rome and Constantine saw it as a tool to unite the empire a lot of things happened. The point I'm trying to get across is that prior to this the accepted practice was to gather on Sunday morning and then again Sunday evening.
Pliny the Younger was commissioned by Trajan to investigate Christians because they were growing in number and pagans were making complaints against them. Numerous Christians were martyred during the interrogations, but among the data that was gleaned was when services were held. The investigation was done around 110-114 AD, just after the end of the Apostolic Era, but a couple hundred years before a govt backed hierarchy was established.