Lets keep it simple...

[maco]

Dear Maco,
up until the first centuries, the Greco Roman empire had named the days of the week by the celestial bodies, the sun, moon, mars, mercury, jupiter, venus and saturn, so any official proclamation by the emperor regarding a day of the week would have used that name. In the document you quoted above, Constantine declared the first day of the week as a work free day. The official name of the first day of the week back then was "dies Solis" or "day of the Sun". The Christians didn't call it by this name, however, they called it "Kyriaki" or "day of the Lord", and all historical evidence shows that Christians had already been particularly gathering on this day to worship God and celebrate the Eucharist, Constantine's declaration had nothing to do with why Christians worshiped God on the first day of the week. They did so in honor of Christ's life giving resurrection on the third day.

When you got out of bed this morning, were you honoring the Norse god Tyr by doing so? What about the next few days, are you keeping a special place in your heart for Woden, Thor and Friya? If I were prime minister of Australia and declared that every Thursday was to be a public holiday, does that by default mean I am associating the holiday with Thor?
This appears to be the nonsense you are claiming by your quote.

For someone who is so particular about honoring the Sabbath, you seem a bit to prone to bearing false witness against your neighbor.

God tells us through Daniel how the Beast would change God's Law and God's times. All these historical changes to God's will did not come through Jesus or the Apostles, but rather, they came long after them with much persecution, torture and death. This is not the Spirit of God behind these changes.

There are no verses in the Bible that say the early church gathered on Sunday nor does it say the seventh day blessing was changed to the first day. But there are hundreds of verses that say they gathered on the seventh day Sabbath.

Listen very carefully. Paul was preaching the word on the Sabbath long after the death and resurrection of Jesus.

Acts 13:42 So when the Jews went out of the synagogue, the Gentiles begged Paul that these words might be preached to them the next Sabbath.

Notice how the Gentiles begged Paul to teach them again next Sabbath. If the Sabbath was changed to Sunday this would have been a perfect opportunity for Paul to make the change but he didn't. As a matter of fact, almost the whole city came out the next Sabbath to hear the word of God.

Acts 13:44 On the next Sabbath almost the whole city came together to hear the word of God.

Why wait a whole week to gather again? Paul could have said, "Come back tomorrow, Sunday" but he didn't. The cool thing to see, that most people miss, the Jews got mad when they saw all the Gentiles gathering on the Sabbath.

Acts 13:44-45 On the next Sabbath almost the whole city gathered to hear the word of the Lord. When the Jews saw the crowds, they were filled with jealousy. They began to contradict what Paul was saying and heaped abuse on him.

The seventh day is part of creation itself and since God created it as a blessed and sanctified day it remains a blessed and sanctified day. Neither sin or the Law changed that. Only the Beast, working through religious man, did. We need to stand for Jesus' kingdom, not the kingdom of Antichrist.