The Islamic calendar explained in detail.
Please share your thought.

https://www.youtube.com/watch?v=fvuVsqqP_lw&list=FL7BIUNwovXOYd0oOtDpCSGQ&index=106&t=87s

Siyam of Ramadan is During The "Harvest" Moon

https://www.youtube.com/watch?v=cOG1XeZ0xzI