If we do not keep God's holy days, we will deprive ourselves of the knowledge of God's plan or purpose. Ancient Israel was termed the Church in the Wilderness, a type of the church of God. Leviticus 23 enumerates the feasts of the Lord, beginning with the weekly Sabbath, the covenant sign between God and His people. Keeping any other day than the Sabbath is an affront to God. God gives details as to how to keep each of these convocations. The seven annual holy days are not considered Jewish or Old Testament, but God's holy days, including the Passover, Pentecost, Trumpets, Day of Atonement, and Feast of Tabernacles. Anti-Semitism has been, and continues to be, the catalyst for hatred of these annual holy days of God. Emperor Constantine condemned Judaizers as anathema to Roman Catholicism. The real founder of Christianity, Jesus Christ, kept all the annual convocations, never abolishing them or their significance, anticipating their continuance in God's Kingdom. John's gospel indicates that Christ continued to keep the Feast of Tabernacles and the Last Great Day, as well as the Passover, faithfully keeping the festivals outlined in Leviticus 23 and Exodus 12, providing an example for us. Jesus commanded His disciples also to keep these festivals and to teach others to do so as well. The apostle Paul also faithfully taught and admonished the Gentiles to keep these days. The seven annual feasts are still in force today, and will be kept in the Millennium, when everyone will be following in Christ's footsteps.