You say "everyone". Did you take a poll?
Much better than a "poll." I have actually read what they wrote about the subject. Precision was their strong point. Those Early Christians minced no words and did not suffer fools gladly. I think I can honestly assert that I have read everything that is available from the Early Church Fathers.
When they said "The Lord's Day," they meant Sunday. When they said "Sabbath," they meant Saturday.
They were energetically-involved in making extremely sharp distinctions between Judaism and Christianity. They condemned every effort by the Judaizing/Ebionite heretics to blend the two religions. They left no ambiguity. They were fighting for their lives and the life of the Christian church.
To a man, they denounced Sabbath Keeping as completely contrary to the Gospel and dishonest to the Resurrection. In order to draw sharp battle lines and to denounce clear error, they made crystal clear distinctions between Sunday/The Lord's Day and Sabbath/Saturday. They were very precise with their language.
To a man, they preached that Sabbath Keeping was an outright renunciation of the Resurrection and the Grace of Jesus Christ.
It was a matter of life and death, both for themselves personally and for the fledgling Christian Church. A modern-day heretic illustrates precisely the battle lines drawn by the First Century Christians, and the reason they so sharply defined "The Lord's Day." You can choose Sabbath Keeping as your Salvation, or you can choose the Resurrection, the Gospel and Grace as your Salvation. But not both. The heretics themselves are extremely precise in their definitions. They don't mince words either. Here's Ellen G. White on her revival of the vile, Satanic and anti-Christian Ebionite Heresy:
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It means eternal salvation to keep the Sabbath holy unto the Lord. God says: "Them that honor Me I will honor." {6T 356.4}
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But if we turn aside from the fourth commandment, so positively given by God, to adopt the inventions of Satan, voiced and acted by men under his control, we cannot be saved. We cannot with safety receive his traditions and subtleties as truth." {RH, July 6, 1897 par. 4}
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No one who disregards the fourth commandment, after becoming enlightened in regard to the claims of the Sabbath, can be held guiltless in the sight of God." {RH, July 6, 1897 par. 14}
"All will be judged according to the light that has shone upon them.
If they have light upon the Sabbath, they cannot be saved in rejecting that light."{HS 234.3}
"As persons become convinced from the Scriptures that the claims of the fourth commandment are still binding, the question is often raised,
Is it necessary in order to secure salvation that we keep the Sabbath? This is a question of grave importance. If the light has shone from the word of God, if the message has been presented to men, as it was to Pharaoh, and they refuse to heed that message, if they reject the light, they refuse to obey God, and cannot be saved in their disobedience." {RH, January 5, 1886 par. 2}
Nothing changed during the interim between First Century Christianity and when the above-quotes were made. The Battle lines were and are still PRECISELY where they were in the First Century. Nobody moved the "goal posts." Both sides are in total agreement: You can choose the Gospel. Or you can choose the Sabbath. They do not mix. Not one bit. The Battle lines have always been clear. And so was the First Century Christian's definition of the Lord's Day. The modern-day heretic and her frontal attack on Christianity is in total agreement: Language is precise. Sabbath Keeping,
not the Gospel, is the source of Salvation.
That is
NOT Christianity. The open advocacy of this ancient heresy on a Christian website is shocking and disturbing.
Choose wisely.