Muharram is the real new beginning. Each year, Muslims around the world experience the first of the month on a different day, in a different manner, and eventually in different seasons.
These guidelines was adopted in the Islamic Shura Council of North America meeting in Chicago moon sighting on January 19th 1995. It was signed by all the leaders.
In AD 638, six years after the death of the Prophet Muhammad, Islam's second caliph Umar recognized the necessity of a calendar known as Hijri calender, to govern the affairs of the Muslims. This was a practical matter.