Hello Judge not, there is no such thing as absolute proof in regards to dates concerning this subject.
There appears to be a flaw in the timing utilized in your argument.
Let's assume your hypothesis that 31AD is correct for the sake of your argument, judge not.
Hence, thursday would be a sabbath day, no work is done by the Jews, household confinement.
If Jesus was buried on wednesday preceeding thursday, the sabbath, then Jesus rises on the
third day, Friday. Jesus cannot be laid to rest at any time on Wednesday otherwise Jesus
rises on Friday.
1 Corinthians 15:4
and that He was buried, and that He was raised on the third day according to the Scriptures,
Jesus is raised on the third day, not after the third day.
I do require you to furnish the scripture that supports a resurrection on the fourth day.
I consider Jesus's words as absolute proof on a subject versus the speculations and miscalculations of men.
Jesus defined what a day and a night represented.
Maybe on a personal level it would make sense.
If I left you on Wednesday evening somewhere around 6 pm and said meet me back here exactly in 3 days. Would you show up on Friday morning. I know I wouldn't be there until Saturday at 6 pm 3 days later.