Cepu Idul Adha, mom's school. Idul Adha is the Muslim holiday celebrated on New Years Day. The focus is on giving meat to the poor, through the context of the story of Abraham, who was instructed by God to sacrafice his son Isaac as a test of his faith and loyalty to God. Upon seeing Abraham ready to carry out this order, the Lord stayed his hand, and a goat was sacraficed in his place.
So,, every year, Muslims sacrafice cows & goats, and give the meat to local poor; many of whom can't afford to eat meat most of the year.

Nina's mom is a school teacher, and these goats were "sacraficed" on school grounds.