As for using lunar moon cycle it is not only used by descendant of Ishmael but descendant of Isaac as well.
Yes dear brother, and in the link that I provided the polytheist trinitarian pagan above, he'll see the following verses from the Bible:
Numbers 10:10 During the celebration of the New Moon Festival and other religious festivals, sound the trumpets while you offer sacrifices. This will be a reminder that I am the LORD your God.
1 Samuel 20:5 David answered: Tomorrow is the New Moon Festival, and I'm supposed to eat dinner with your father. But instead, I'll hide in a field until the evening of the next day.
1 Samuel 20:18 After this Jonathan said: Tomorrow is the New Moon Festival, and people will wonder where you are, because your place will be empty.
1 Chronicles 23:31 They must also give thanks and sing praises when sacrifices are offered on each Sabbath, as well as during New Moon Festivals and other religious feasts. There must always be enough Levites on duty at the temple to do everything that needs to be done.The anti-Islamics always prove themselves to be fully ignorant of their own Bible. What they attack Islam on is usually many times worse in the Bible. Here we have celebrations of the New Moon, while in Islam we don't have that.
To the ignorant Polytheist Trinitarian Pagan:
So now, are you a pagan for celebrating New Moon Festivals according to the Bible? And you do know that in Islam we don't even celebrate the New Moon nor anything else that is created. But in the Bible you have that. So what you attacked Islam on turned out to be in the Bible and not Islam.
Again, typical ignorant anti-Islamic.
Osama Abdallah