If Christ died on a Friday and was raised on a Sunday, how come the Bible speaks of his being in the tomb for three days and three nights before his Resurrection (Mt 12:40; Mk 8:31)?
Is there a contradiction here? No, because the ancient Jews counted as a whole day any part of a day, so “three days and three nights” (which means the same as “three days” in modern usage) could be as little as twenty-four hours plus a few seconds on either side–if there had been, back then, clocks that could register seconds.
In our way of reckoning things, from lunch time today to lunch time tomorrow is one day. Ancient Jews would have counted it as two days because it includes parts of two distinct days.
Catholic Answers Staff