Pastor Derek answers: "What is Yom Kippur and why is it important?" He describes how Christ has already fulfilled His part of the Day of Atonement in His sacrificial death and resurrection, but that the complete fulfilment of this Feast awaits Israel's national repentance in the Tribulation, when all Israel will be saved, which will then provide the basis for the 2nd Coming of Christ, when He will fulfil the Feast of Tabernacles.