In the process of revealing His plan of salvation for mankind, God established His annual Holy Days around the harvest seasons in the Middle East (Leviticus 23:9-16; Exodus 23:14-16).
Just as His people harvested their crops around these three festival seasons, God's Holy Days show us how He is harvesting people for eternal life in His Kingdom.
The Holy Days have meanings that build upon each other. Together they progressively reveal how God works with humanity.