In this paper I deal with questions connected with the regnal years of Tiberius, the Jewish calendar and the astronomical phenomena that governed it, and the eclipse mentioned in Luke xxiii 45, so far as they affect the determination of the date of the Crucifixion. I do not discuss questions connected with the accuracy of the different gospels or notes of time other than those given in terms of regnal years, days of the week, or Jewish festivals. For instance, the age of Jesus at the beginning of his ministry (Luke iii 23) and the forty-six years of John ii 20 do not concern me. There is little or nothing new in this paper, but the standard discussions seem always to have overlooked some part or other of the published material, and I hope, therefore, that it may be of service to review what is given us by the lines of evidence which I have mentioned.