Your claim seems to make very convenient use of different languages and how different cultures mark the start and end of days.
First of all, the claim about Sunday is meaningless to a Spaniard, for instance, who worships God on Domingo.
Secondly, why use the name Shabbat and not Saturday (if you are going to use the English word for a day of a week you should be consistent)? Because your argument collapses there as well because the Sabbath IS NOT Saturday because it begins at nightfall on Friday.
Christians, not just Catholics but all Christians, understand that GOD ROSE FROM THE DEAD on Easter SUNDAY. It was HIS decision to Rise on the day that Greek and Roman pagans honored the sun. Whay(sic) should we second guess His will?
You are free to deny that just as you deny the Holy Trinity. You are even free to call us Romanists (though you should also call Calvinists and Baptists Romanists because they share far more beliefs with Catholics than they do with you), but that does not make you right.
There is an error in logic called "post hoc ergo propter hoc" I don't think the Spanish name was prior to Exodus. Yah'shua rose prior to dawn on the pagan first "day" of the week, The Feast of First Fruits ---- If you were familiar with the Holy Word of G-d (Jesus) see John 1,
shalom b'SHEM Yah'shua HaMashiach
days begin at sundown and end at the next sundown.
A study of Genesis 1 with the Breath of G-d will illuminate the text.(See Exod. 23:16, 19; 34:22, 26; Lev. 2:12; 23:10, 17, 20;
--- however began at sundown "Saturday" night.
Num. 18:12; 28:26; Deut. 18:4; 2 Ki. 4:42; 2 Chr. 31:5;
Neh. 10:35; 12:44; 13:31; Ps. 105:36; Ezek. 44:30;
Rom. 8:23; 1 Co. 15:20, 23; 16:15; Jas. 1:18; Rev. 14:4)
Why would the creator of the universe celebrate
a Pagan day when He had commanded Feast Days of His own ?
If you ever meet Him you can ask Him why He chose Saturn's day.
The way I see, it you can have it one of two ways, you do not get to change languages just to fit an adenda. Here are the choices:
1. Jews worship God from sundown on Friday until sundown on Saturday and Christians worship God on Sunday.
or
2. Jews worship God on Shabbat and Christians worship God on Rishon.
Take your pick, but I'm not going to play a game where you get to use Hebrew names of the week for Jewish observation and English names for Christian observation.
I am curious though, why don't you go onto Christian threads that have NOTHING to do with Catholics and tell the Calvinists, Baptists, Methodists, etc. that they are "Romanists" who follow pagan traditions?