So a few thoughts after reading some early church writings. This was a far bigger topic and debate than I ever realized. Extending even into todays time. When I first began exploring what keeping the Sabbath may look like it I was ignorant of this hotly debated topic. That being said this source I found is clearly arguing a case for keeping tbe Sabbath. But with that in mind these early writings and history seem to indicate it is important. It's a long read. Here are a few quotes I found interesting.
" This writer specifies the different things which made up the Jewish observance of the Sabbath. They may be summed up under two heads: 1. Strict abstinence from labor; 2. Dancing and carousal. Now in the light of what Origen has said, we can understand the contrast which this writer draws between the Jewish and the Christian observance of the Sabbath. The error of the in the first part of this was that they contented themselves with mere bodily relaxation, without raising their thoughts to God, the Creator, and this mere idleness soon gave place to sensual folly.
The Christian, as Origen draws the contrast, refrains from labor on the Sabbath that he may raise his heart in grateful worship; or, as this writer expresses it, the rejoicing in meditation on the law; but to do thus, he must hallow it in the manner which the law commands, that is, in the observance of a sacred rest which commemorates the rest of the Creator. The writer evidently believed the observance of the Sabbath as an act of obedience to that law on which they were to meditate on that day. And the nature of the epistle indicates that it was observed, at all events, in the country where it was written. But mark the work of apostasy. The so-called Lord's day for which the writer could offer nothing better than an argument drawn from the title of the sixth psalm (see its marginal reading), is exalted above the Lord'"
" Irenaeus asserts their perpetuity, and makes them a test of
Christian character. Thus he says:
"For God at the first, indeed, warning them [the Jews] by means of natural precepts, which from the beginning he had implanted in mankind, that is, by means of the Decalogue (which, if any one does not observe, he has no salvation), did then demand nothing more of them." 1
This is a very strong statement. He makes the ten commandments the law of nature implanted in man's being at the beginning; and so inherited by all mankind. This is no doubt true. It is the presence of the carnal mind or law of sin and death, implanted in man by the fall, that has partially obliterated this law, and made the work of the new covenant a necessity. 2 He again asserts the perpetuity and authority of the ten commandments in the following words:
"Preparing man for this life, the Lord himself did speak in his own person to all alike the words of the Decalogue: and therefore, in like manner, do they remain permanently with us, receiving, by means of his advent in the flesh, extension and increase, but not abrogation."
https://www.bibletools.org/index.cfm/fuseaction/library.sr/CT/BOOK/k/960/sabbath-in-record-of-early-fathers.htm#:~:text=The%20testimony%20of%20Novatian%2C%20which,those%20holy%20men%20of%20old.