Boiling it down Allah is Yahweh, correct me if I'm wrong.
Almost forgot to address this, and no, it couldn't be more wrong, in spite of the tragedy of the use of the Arabian pagan's name "Allah" in some Arabic language Bibles. But not all Arabic language Bibles:
What happened to Allah?
Let alone that there is no physical evidence that suggests the Arabic language existed before about the 3rd century AD.
Quoting from first language Arabic Dr. Rafat Amari's 20-year full-time study of Islam and Arabian history and archaeology, "Islam: In Light of History", on the etymology of the name "Allah":
"We know that the term 'Allah,' as the god of the moon, was derived from the Thamud god of the moon. His name was Hilal, or Hlal, which means 'crescent.' Later, the name 'Hilal' became Hilah, as we see in many inscriptions which were found in Arabia. In the Thamud inscriptions he is found as H-ilah, Ha-ilah and H-alah. We see the same development for 'Hilah,' the moon deity in Yemen, where Almaqah is called 'Halal,' or 'Hilal, the Crescent.'
Safaitic tribes were nomads wandering in many parts of Arabia, especially in the north. The god of the moon was found in their inscriptions as 'H-lah.' in the Safaitic inscriptions, the letter 'H' pronounced as 'Ha' is the definite article, 'the.' It corresponds to the Arabic, 'Al.' This led the Arabians to call him 'Al-lah.'"
THE NAME "ALLAH"
So it should not be a surprise to learn that prior to Muhammad some Mandaean and/or Harranian, Sabians, "fasted" by day during the month that began and ended with the appearance of the crescent moon in the sky. "Ramadan was originally an annual ritual performed at the city of Harran."
THE ORIGIN OF RAMADAN