Argument of days of worship in the new testament

In the New Testament, there are several arguments made about the days of worship. Here are a few examples:

The Sabbath (Saturday) vs. Sunday

The Day of the Lord

The Lord's Day vs. the Sabbath

The Early Church's Practice

Overall, the New Testament presents a complex and nuanced view of the days of worship, with both the Sabbath and the Lord's Day being observed by early Christians. While the Sabbath was seen as a day of rest and a shadow of things to come, the Lord's Day was seen as a day of worship and celebration, and a day of salvation and redemption.