He arose ON the third day.
The 72hr theory has him arising on the FOURTH day.
The first day of the week is the third day, upon which he arose. To arise ON the third day, according to the 72hr view, he had to have arisen ON the sabbath, not the first day of the week. But he arose ON the third day, and it was ON the first day of the week.
A Thursday crucifixion with a 72hr requirement has the resurrection taking place AFTER sunset SUNDAY. Thurs night, Fri day, Fri night, sat day, sat night...oops, we need one more DAY IN THE TOMB to satisfy a 72hr requirement... which means he would have been resurrected AFTER sunset on Sunday... thus ON the fourth day, and not as the bible says on the THIRD day.
A wed crucifixion with a 72hr requirement does not fit the scripture, for it has him resurrecting on either the FOURTH day, or on the SABBATH.
A Thursday crucifixion with a 72hr requirement doesn't fit either, for then he is rising on the FOURTH day AND on the SECOND day of the week.
ANY theory that uses a 72hour requirement CANNOT fit the biblical data of him rising on the third day AND on the first day of the week.
Therefore, the 72hr theory is to be rejected.
Having dispensed with that, it remains to be seen if a Thursday, wednesday , or Friday crucifixion satisfies all the biblical data.
A Wednesday crucifixion and a Sunday resurrection has him rising the fourth day if you do not count the day he actually died, and if you include that day then he rose the fifth day. Not as the bible says "the third day".
A Thursday crucifixion gives us rising on the third day on Sunday IF you do not count the day he was crucified. If you do then he is rising on the fourth day not the third.
Luke 24:19-21 says the resurrection, on the first day of the week, was on the third day
since his arrest, which according to a Thursday crucifixion theory would have been on Wednesday night the fourth day of the week. BUT the third day since Wednesday night would be the SABBATH, seventh day of the week. And thus impossible according to the bible data.
A Friday crucifixion is the only thing that satisfies the biblical data. Both the wed and thursd theories do not.