EN.ZU

Sîn (/ˈsiːn/) or Suen (Akkadian: 𒂗𒍪, EN.ZU) is the Mesopotamian god representing the moon. The moon played a key role in Mesopotamian religious culture. Sîn was sometimes pictured as riding his crescent moon-boat as it made its monthly journey through the skies. The name of the moon god could thus be represented by logograms reflecting his lunar character, such as 30 (𒀭𒌍), referring to days in the lunar month or U4.SAKAR (𒀭𒌓𒊬), derived from a term referring to the crescent.

Sîn continued to play a role in Mesopotamian religion after the Akkadians. The Israelites rejected all deities but Yawheh, but they apparently retained the new moon festivals of their Mesopotamian ancestors. "At your times of rejoicing—your appointed feasts and New Moon festivals—you are to sound the trumpets [...]"