Romans 14:5

One man esteems one day above another: another esteems every day alike. Let each man be fully assured in his own mind.

Ὃς μὲν κρίνει ἡμέραν παρ’ ἡμέραν, ὃς δὲ κρίνει πᾶσαν ἡμέραν· ἕκαστος ἐν τῷ ἰδίῳ νοῒ πληροφορείσθω.

Greek

What we did

We kept the ASV's wording, in modern English.

Why

κρίνει
is "judges, decides." With ἡμέραν παρ’ ἡμέραν, "a day beside a day," it means to rate one day above another.
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The ASV's "esteems" gives that sense, and we kept it.
"Every day alike."
The Greek is shorter: κρίνει πᾶσαν ἡμέραν, "judges every day." The ASV adds "alike" to complete the comparison, and we kept it.
No days are named
The verse says ἡμέρα, "day," without naming which days.
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Neither νόμος (74 times elsewhere in Romans) nor "Sabbath" occurs in chapter 14. The English adds nothing the Greek does not say.
πληροφορείσθω
is "let him be fully assured," a present imperative.
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The ASV's "fully assured in his own mind" renders it exactly.