Most people who believe in God believe that He has a plan of salvation for mankind, but how exactly does this plan work?  Is God calling all of mankind to salvation at this time, or does He have a plan to do this in stages?  The answers to these questions are revealed in the annual Biblical Holy Days that are listed in Leviticus 23.  God commanded these days to be kept by mankind because their spiritual meanings picture for us the details of His plan of salvation for mankind.  This series of study papers covers all of these Biblical Festivals in detail.