Each year, Jews observe Yom Kippur, or a Day of Atonement. Before Yom Kippur, Jews will ask forgiveness of those they have wronged during the past year (if they have not already done so). During Yom Kippur itself, Jews fast and pray for God's forgiveness for the sins they have made against God in the past year. God can only forgive one for the sins one has committed against God. This is why it is necessary for Jews also to seek forgiveness from those people who they have wronged.