Sir I am muslim almdulillah, I came across one confusion, I tried to find proper source for Fasting , when its began , how they decide this is ramazan ,
Who invented the names of months and Days (islamic prospertive) and when fating become Faraz (compulsory ) for Muslims . Please quote with reference ,

Jazakallah in Advance

Hello Sanaullah,

The best suggestion is to ask your Imam, and he will tell you why and how the Ramazan is Faraz it is in the Quran, also please open the link below will gave a little idea about the Islamic Months, Thanks

https://en.wikipedia.org/wiki/Islamic_calendar