1... we are not sure.<quoted text>
I get the impression you're going to believe what you want to believe no matter what.
But for the record: Christ died on a Friday and rose on Sunday. This has nothing to do with Pagan Sun gods or the Roman Empire.
2... According the writings by your own church fathers (patristic fathers), the day was not set by all Christian sects until it was decreed by Constantine.
3... Ask your Parrish Priest if you care about the truth. Otherwise,-- read your own words -- "I get the impression you're going to believe what you want to believe no matter what."
Why post buffoonery? Don't you see enough of that being posted in error? Why add to it?