The Day of the Lord on a nation is its just judgment by God: a nation's full accountability to the just and loving God for the nation's sins throughout its history. The Bible shows many examples of God's just judgment of ancient nations as whole units. National judgments have continued through the centuries after Biblical times, but have become especially common in the last 80 years as nation after nation has come under atheistic communism or another dominating spiritual darkness. As with individuals, a nation that has sinned badly can be justly blessed by joining itself to the Lord Jesus and receiving His sacrifice for sinful mankind. For a nation to receive this blessing, believers in Jesus need to help the people in their land to want Jesus in their hearts and lives. This little book shows all of this and more.