Thanks for clarifying the question.
I like to go by what the bible says
This is what God said:
Lev 23:3 ‘Six days shall work be done,
but the seventh day is a Sabbath of solemn rest, a holy convocation. You shall do no work
on it; it
is the Sabbath of the Lord in all your dwellings.
A holy convocation is a holy gathering like Chruch
Did this change in the New Testament?
Not by Jesus
Luke 4:16 So He came to Nazareth, where He had been brought up. And as His custom was, He went into the synagogue on the Sabbath day, and stood up to read. 17 And He was handed the book of the prophet Isaiah.
Did it change after the Cross?
Acts 13:42 So when the Jews went out of the synagogue, the Gentiles begged that these words might be preached to them the next Sabbath.
Acts 13:44 On the next Sabbath almost the whole city came together to hear the word of God.
Acts 15:21 21 For Moses has had throughout many generations those who preach him in every city, being read in the synagogues every Sabbath.”
Acts 18:4 And he reasoned in the synagogue every Sabbath, and persuaded both Jews and Greeks.
Not by the apostle's
Does it change in the New Heaven and New Earth
Yes. Only because now instead of worshipping Christ in spirit, the saints will be in His physical presence, but the Sabbath remains just as what was promised and how it was meant to be at Creation Gen 2:1-3
Isa 66:23 “For as the new heavens and the new earth
Which I will make shall remain before Me,” says the Lord,
“So shall your descendants and your name remain.
23 And it shall come to pass
That from one New Moon to another,
And from one Sabbath to another,
All flesh shall come
to worship before Me,” says the Lord.