Children's Day/Book Day, also known as El día de los niños/El día de los libros (Día), is a celebration of children, families, and reading and held annually on April 30. The celebration emphasizes the importance of advocating literacy for every child regardless of linguistic and cultural background. Through several grants from the W.K. Kellogg Foundation, the Association for Library Service to Children (ALSC) continues to increase public awareness of the event in libraries throughout the country. ALSC is collaborating on this effort with the Founding Partner of Día, the National Association to Promote Library and Information Services to Latinos and the Spanish Speaking (REFORMA). Día is an enhancement of Children’s Day, which began in 1925. Children’s Day was designated as a day to bring attention to the importance and well-being of children. In 1996, nationally acclaimed children’s book author Pat Mora proposed linking the celebration of childhood and children with literacy to found El día de los niños/El día de los libros.

El 30 de abril es una fecha muy significativa para los niños. Se celebra el día de los niños y de los libros. Esta celebración se conoce como El día de los niños/ El día de los libros, y celebra la alegría y las maravillas de la infancia y la importancia de los libros en nuestra vida.

"Día is a nationally recognized initiative that emphasizes the importance of literacy for all children from all backgrounds. It is a daily commitment to linking children and their families to diverse books, languages and cultures. The common goals of all Día programming are to:

- Celebrate children and connect them to the world of learning through books, stories and libraries.
- Nurture cognitive and literacy development in ways that honor and embrace a child’s home language and culture.
- Introduce families to community resources that provide opportunities for learning through multiple literacies.
- Recognize and respect culture, heritage and language as powerful tools for strengthening families and communities." Read more from the Dia website

Resources for the history of the celebration