Ancient societies were agrarian. From farmers at the bottom to zamindars and kings at the top, everybody depended on a good harvest. The word harvest derives from the Old English hærfest which means autumn. The autumn harvest was usually the largest harvest of the year in the Northern Hemisphere. The weather was neither warm nor cold. Everybody prayed to the heavens for manna (sustenance) to fall. When manna did fall, there would be feast and festivity. When manna didn't fall, it could spell disaster for everybody.