I didn't mean to ignore your post on this. I've sat down and started writing a response many times, but it's a huge subject.
I believe that "first day of the week" when referring to the resurrection of Christ is more properly rendered "the first of the sabbaths".
The wave sheaf offering in the OT represented the ascension of Christ:
Lev 23:11 And he shall wave the sheaf before the LORD, to be accepted for you: on the morrow after the sabbath the priest shall wave it.
The "first of the sabbaths" is the beginning of the count of sabbaths until the feast of Pentecost (also called the feast of weeks):
Lev 23:15 And ye shall count unto you from the morrow after the sabbath, from the day that ye brought the sheaf of the wave offering; seven sabbaths shall be complete:
The wave sheaf would always occur on what we call Sunday, the day Christ ascended to the father.
Here are some good resources for your study.
Good luck and God bless.
Thanks for the links on wave sheaf offering. And yes it is a subject in itself and quite lengthy. May YHWH Bless you in your search for the TRUTH.