A quincenera is a special celebration held for many girls in Spanish-speaking communities of the United States and in Latin America on their fifteenth birthday.The celebration may be different in different countries.The world quincenera can refer to the celebration or to the girl. This birthday isspecial because it celebrates that a girl is not a child anymore and has become a woman. It is a very important day for many your girls, a day theyes dream about for a long time. Everyone who khows the girl will celebrate it with a church ceremony and a big party.