The Fiestas de la Calle San Sebastián is an annual festival held in San Juan, Puerto Rico during the third weekend of January. This vibrant celebration honors the patron saint, San Sebastián, and features a variety of cultural activities, including live music, dance performances, and local food vendors. The festival transforms the streets into a lively atmosphere filled with colorful decorations and parades. It attracts both locals and tourists, showcasing the rich heritage of Puerto Rican culture. The event is known for its community spirit and is a significant highlight in the island's calendar of festivities.