Ruiz,
re: " I will provide them again, and in context they are all talking about the Resurrection."
But you haven’t explained how they prove a first day resurrection.
RS,
Simply, in I Co it says that Christ rose on the third day and appeared. It is highly unlikely he rose the day before or the day after, but appeared the same day he rose. Turning to the Gospels, we see affirmation of this fact. Thus, we must negate Christ's Resurrection as occurring after the first day of the week, and because of I CO we must negate a resurrection occurring before that date.
Yet, let's say I am wrong, then how else could you interpret these texts?