A quinceañera traditionally celebrates a girl's 15th birthday.
The Spanish word quinceañera refers both to the celebrant and, commonly, to the celebration itself. The age marks a symbolic transition from childhood toward young womanhood in many Latin American and Latino communities.
The celebration often combines a formal ceremony, a large family gathering, music, dancing, special clothing, and a meal. Customs differ by country, family, religion, and generation, so not every quinceañera follows the same program.
The tradition is sometimes described as a single ancient rite, but modern quinceañeras developed through a mixture of Indigenous, Spanish, Catholic, and later regional influences. The central age of 15 is the most consistent feature, while details such as court members, religious services, and dances vary.