Yet in spite of the evidence they choose to disbelieve that their rituals spring from Arabian pagan moon worship (site found on search of "Hilal"):
http://hilalsighting.org/
More on the origin of Ramadan:
http://www.falseprophetmuhammad.com/origin_of_ramadan.htm
http://www.petewaldo.com/sabians_islam.htm
Even as we find from Thamud inscriptions the word for the moon "H-alah" illustrates origins of the development of the name of the god that they worship:
http://www.falseprophetmuhammad.com/the_name_allah.htm#etymology_name_allah