Islamic festivities and celebrations are termed Eid. Eid e Fetr or the conclusion of Ramadan is one of the greatest celebrations of the Muslims. One month of fasting, prayers,piety and attending to the needs of others is actually a practice to transform our attitude and behavior.
There is a narration from Imam Sadegh the sixth descendant of the Prophet (SA) that reads as follows: The Eid is the day when there is no rebellion against God (or in other words no oppression against people).
Oppression in any form, in any place, in any time is a rebellion against God, since God has created humans and breathed His Spirit unto them and has appointed humankind as His viceroy on earth. He has dignified the humans in their creation and for that reason human life is sacred and should be respected as such.