The month of Allah Muharram is a great and blessed month. It is the first month of the Hijri year and is one of the sacred months concerning which Allah says (interpretation of the meaning):
“Verily, the number of months with Allah is twelve months (in a year), so was it ordained by Allah on the Day when He created the heavens and the earth; of them four are Sacred, (i.e. the 1st, the 7th, the 11th and the 12th months of the Islamic calendar). That is the right religion, so wrong not yourselves therein”
[Soorat at-Tawbah 9:36]