Now, concerning the literal translation (28:1), there is an idiom/phrase in it, I believe. You use the word Sabbath a second time in the verse, but it is there to mean the week and the word one/first is there, so it is the first of the week in that second usage, not another happening of Sabbath. The days were counted, so it is taking about day one of the week. It also means that for acts20:7 and 1cor16:2, I think, but Greek is far beyond my field of expertise.
Have you read chapter 3 from Samuele Bacchiocchi's book about the crucifixion and resurrection timing? It talks about what the "day of preparation" means. It is online [here](http://www.biblicalperspectives.com/books/crucifixion/2.html). His stuff seems to talk about your topic of interest. I'm not sure what religion the fellow is, though, or what his purpose it.