10 Muharram Is the 1st Month Of Islamic Calender

Muharram - Wikipedia
https://en.wikipedia.org/wiki/Muharram
Muḥarram (Arabic: مُحَرَّم muḥarram) is the first month of the Islamic calendar. It is one of the four ... Shia muslims don't fast on the 10th day of Muharram, but some don't eat or drink until zawal (afternoon) to show their sympathy with Imam ...
‎Ashura · ‎Mourning of Muharram · ‎Tasu'a · ‎Lunar calendar