According to the Book of God, from the day He created the heavens and the earth, the number of months are twelve, four of which are sacred.
"Tirada bilaha Eebe waa Laba iyo Toban kitaabka Eebe dhexdiisa tan iyo maalintuu abuuray samooyinka iyo dhulka, waxaana kamid ah afar xurmo (gaar) ah leh...." [9:36].