A quincennera (pronounced "kin-sin-yera") is a special celebration held for many girls in Spanish-speaking comunities of the United States and in Latin America on their fifteen birthday. The celebration may be different in different countries. The word quincenera can refer to the celebration or to the girls. This birthday is special because it celebrates that a girl is not a child anymore and has become a women. It is a very important day for many young girls,will celebrate it with a church ceremony and a big party.