As a side note here, I am amazed at this site that people accuse me of making claims and assertions that I supposedly have no evidence for. Trust me, being a fan of Sir Isaac Newton, I would not make a claim unless I believed it had some validity. I'm not saying I'm always right, but I don't make claims lightly is my point and as someone who has not studied as if I just ramble out some ideas. So it's best to see why claims I make are thus stated.
The reason I say this is that I was accused on another forum of "making assertions" regarding flat earth theory I was saying why this earth can't be flat. I even gave mathematical proofs why the flat earth model does not work but yet after my proof, I am still accused of "making assertions" (without the accuser so much as showing one equation) . Trust me, one does not "make assertions" with actual numbers which I gave as a mathematical proof. Such things are calculated, not asserted. Yet, I am deemed as one "making assertions".
Only on a religious forum can some people make something as precise and black and white as mathematics subject to interpretation. I can see why Jesus did not get along well with the religious authorities of the day. LOL
Now all that said, the OP once upon a time used to debate the validity of a Friday crucifixion. He changed to a Thursday apparently in this thread, which while I don't agree with, I am at least more tolerant of. Since Christ stated he'd be in the grave 3 days and 3 nights, that's 72 hours. Simple as that. Since he arose the same time of the day he was placed in the tomb (in the evening) and since he was arisen for the feast of firstfruits, that means he arose Sabbath at sundown as Sunday commenced. 72 hours before then would be Wednesday at sundown as Thursday commenced, thus I believe he died on a Wednesday afternoon and placed in the tomb for the start of Thursday. Thursday night-day, Friday night-day, Saturday night-day; 3 days and 3 nights. As the Sabbath ended, he arose being fully alive for Sunday, the first day of the week.