Col 2:16 is about not judging others

[Leaf473]

Even you attempted the suggestion that they could not know anything but the OT scripture until some two centuries later when a church council would hand them the NT.

Well, the New Testament Canon took centuries to develop. But that that's not the same as knowing nothing.

 

[Leaf473]

Is 58:18 NASB
13 “If, because of the Sabbath, you restrain your foot
From doing as you wish on My holy day,
And call the Sabbath a pleasure, and the holy day of the Lord honorable,
And honor it, desisting from your own ways,
From seeking your own pleasure
And speaking your own word

YLT
13 If thou dost turn from the sabbath thy foot, Doing thine own pleasure on My holy day, And hast cried to the sabbath, `A delight,' To the holy of Jehovah, `Honoured,' And hast honoured it, without doing thine own ways, Without finding thine own pleasure, And speaking a word.

"My Holy" qōḏeš
קֹדֶשׁ

Day - yôm

I asked where you saw it in the lxx, which is likely what John's readers would have known.

Here's Isaiah 58:13 in the lxx, which is what John's readers would probably have been most familiar with:
ἐὰν ἀποστρέψῃς τὸν πόδα σου ἀπὸ τῶν σαββάτων τοῦ μὴ ποιεῖν τὰ θελήματά σου ἐν τῇ ἡμέρᾳ τῇ ἁγίᾳ καὶ καλέσεις τὰ σάββατα τρυφερά ἅγια τῷ θεῷ σου οὐκ ἀρεῖς τὸν πόδα σου ἐπ᾽ ἔργῳ οὐδὲ λαλήσεις λόγον ἐν ὀργῇ ἐκ τοῦ στόματός σου

Where are you seeing holy day of the Lord?

Ησαΐας (Isaiah) 58 :: Septuagint (LXX)

Ησαΐας (Isaiah) 58 - ἀναβόησον ἐν ἰσχύι καὶ μὴ φείσῃ ὡς σάλπιγγα ὕψωσον τὴν φωνήν σου καὶ ἀνάγγειλον τῷ λαῷ μου τὰ ἁμαρτήματα αὐτῶν καὶ τῷ οἴκῳ Ιακωβ τὰς ἀνομίας αὐτῶν

www.blueletterbible.org

 

[Leaf473]

I only ask if you ever wonder how it is that all of Christianity appears to differ with the preference you have chosen.

Well, I'm explaining how that is

 

[Leaf473]

If you think it about - you should not be surprised at all that I would not agree with your dismissing the Ten given that pretty much all of Christianity also differs with you and that detail.

I don't dismiss the 10.