The Three-Fold Division of the Law

[Gerhard Ebersoehn]

And Matt 28 also has the same word (and shabbaton) in multiple translations I checked.
Mat 28:1 Now after the Sabbath, toward dawn on the first day of the week, Miryam from Maḡdala and the other Miryam came to see the tomb.
And if you desire understanding, you do need to know about the feast of weeks in Lev 23. If you don't, you don't.

Ditto above,
In the end of "the Sabbath (Day-of-the-week)" is the Christian, New Testament, Greek Idiom, 'Sabbátohn' meaning, not <week>, but, being the Genitive, meaning, "on the Sabbath" or "on the Sabbath Day" or "Sabbath Day-time" or "Sabbath's-time" ("Sabbath"--'Saturday night' and 'Sunday' day).

... needing no understanding or even to <<know about the feast of weeks in Lev 23>>.