months in a year twelve double hours in a day each division of Sumer was assigned 12 celestial bodies as a measure of good luck many studies such as the one by s Langdon show that the division of the year and 12 months was from it's very beginnings related to the twelve great gods fritz Hummel and others after him have shown that the 12 months were closely connected with the 12 zodiacs and that both derived from 12 principal celestial bodies Charles F Jean reproduced a Sumerian list 24 celestial bodies that paired 12