From Wikipedia:
"Quinceañera (lit. meaning One (f.) who is fifteen), sometimes called "Fiesta de quince años", "Fiesta de Quinceañera", "Quince años" or simply "quince", is the celebration of a girl's fifteenth birthday in parts of Latin America and elsewhere in communities of immigrants from Latin America. This birthday is celebrated differently from any other birthday, as it marks the transition from childhood to young womanhood.[1] The celebration, however, varies significantly across countries, with celebrations in some countries taking on, for example, more religious overtones than in others."