The "moon turned to blood"
GradeWeak
At Pentecost Peter quoted the prophet Joel: "The sun shall be turned into darkness, and the moon into blood" (). Humphreys and Waddington (1983) proposed that the partial eclipse of the moon on Friday 3 April 33, visible as the moon rose over Jerusalem, lies behind this quotation and behind the tradition of darkness at the crucifixion. The eclipse itself is real, and it falls exactly on one of the two dates the astronomy allows. If the proposal is right, it would favour 33 as the year of the crucifixion.
Weak. The eclipse date is real and agrees with the Passover calculation. But its link to the crucifixion depends on reading Peter's quotation as a report of something people had just seen.
Explore the counterarguments
The words are Joel's, and Peter cites them to explain the events of Pentecost, not to describe the crucifixion. The text does not say that the moon had been seen red on the day Jesus died. Without that, the eclipse is a striking coincidence of dates, not evidence for the year.