<P> Muḥarram (Arabic: مُحَرَّم ‎ ‎ muḥarram) is the first month of the Islamic calendar . It is one of the four sacred months of the year . It is held to be the holiest month, Ramadan coming after . The word "Muharram" means "forbidden". Since the Islamic calendar is a lunar calendar, Muharram moves from year to year when compared with the Gregorian calendar . </P> <P> The tenth day of Muharram is the Day of Ashura, which to Shia Muslims is part of the Mourning of Muharram . Sunni Muslims fast during this day, because it is recorded in the hadith that Musa (Moses) and his people obtained a victory over the Egyptian Pharaoh on the 10th day of Muharram; accordingly Muhammad asked Muslims to fast on this day that is Ashura and on a day before that is 9th (called Tasu'a). Shia Muslims mourn the death of Imam Hussein (as) and his family, respecting the sacrifice of the martyrs by praying in abundance and refraining from all joyous events . </P> <P> Shia Muslims During Muharram, Shia Muslims do different things and with different intentions . Shia Muslims observe and respect Muharram as the month that martyred Hussein ibn Ali, the grandson of Muhammad and son of Ali, in the Battle of Karbala . They mourn for Hussein ibn Ali and refrain from all joyous events . Unlike Sunni Muslims, Shias do not fast on the 10th day of Muharram . In addition there is an important Ziyarat book, the Ziyarat Ashura about Hussein ibn Ali . In the Shia sect it is popular to read this ziyarat on the "Day of Ashura", although most of the Shias try to read Ziyarat Ashura every day and they send salutations to Hussein ibn Ali . </P> <P> With the sighting of the ((new moon),) the Islamic New Year is ushered in . The first month, Muharram, is one of the four sacred months that Allah has mentioned in the Quran: Muharram, Rajab, Dhu al - Qi'dah, and Dhu al - Hijjah . Even before Islam came, Quraish and Arabs as a whole knew the sanctity of the months and were forbidden to wage war on those months . </P>

What is the speciality of muharram 9 and 10