Adam Clarke on John 12:1

Six days before the Passover - Reckoning the day of the Passover to be the last of the six. Our Lord came on our Sabbath, the first day of the Jewish week, to Bethany, where he supped; and on the next day he made his public entry into Jerusalem: Joh 12:12. Calmet thinks that this was about two months after the resurrection of Lazarus, on the 9th of Nisan, (March 29), in the thirty-sixth year of our Lord's age. It has been observed before - that Calmet adds three years to the common account.