Scholars agree that in some cases, in counting any unit of the measure of time, any time during the last unit of measure causes the count to include that entire unit although the unit was not fully fulfilled. For that reason, reference to Christ risinG THE THIRD DAY means DURING THE THIRD DAY he would rise and not necessarily
after three full days.
Mark 10:34 KJV And they shall mock him, and shall scourge him, and shall spit upon him, and shall kill him: and
the third day he shall rise again.