The meat from the sacrificed animal is preferred to be divided into three parts. The family retains one-third of the share; another third is given to relatives, friends and neighbours; and the remaining third is given to the poor and needy.
In the Islamic lunar calendar, Eid al-Adha falls on the 10th day of Dhu al-Hijjah and lasts for three days. In the international (Gregorian) calendar, the dates vary from year to year drifting approximately 11 days earlier each year. [Source : Wikipedia]