Jesus told his apostles not to forsake the gathering, if they had of forsaken it there would have been no Pentecost which is when the first day of the week gathering started.
It did not change the Sabbath.
Pentacost is not on a Sunday, except by accident. In the 1st century they started counting 49 days the day after Passover, no matter what the day of the week. It comes from reading Lev 23:10-11 and Joshua 5 to see how the Israelites actually did it when they first came into the Land.
Raven, with study ‘Pentecost’, the birthday of the church actually falls on one of His weekly Sabbaths.
But it would mean rejecting Rome’s calendar and Rome’s count.
And it would allow Moses coming down the mount after 100 days from the first Passover with the tablets of the covenant and 3000 people killed to mesh with the gift of the Holy irit and 3000 souls saved in Acts.
And that day, with study, would be the 29th day of our Father’s 4th month. A natural ‘weekly’ Sabbath when one studies the calendar template Ezekiel received from our Soveriegn..
His Sabbath isn’t Saturday or Sunday every week.. and it certainly is a way Satan steals worship..