The attached file is a Bible Study presentation delivered in the first Summer Seminar at Bashan Hill, July 2016. It presents the truth that the purification of God’s church will occur on very day and week of Passover. Hence it is known as the “antitypical Passover.” Many have sneered at the fact that God’s Calendar is the key to knowing when these events will transpire, and so run the danger of being surprised “at their unholy feast,” for they will be hosting their version of a “solemn assembly,” on a day and hour when their Lord will not appear. Please leave your feedback at the end of this study.