School Librarian Day is celebrated on April 4th of each year.
A librarian is a person who works professionally in a library, and may hold a degree in librarianship (known either as library science of library and information science).
A school library exclusively serve the needs of a public or private school. The primary purpose is to support the students, teachers, and curriculum of the school or school district. In addition to library administration, certificated teacher-librarians instruct individual students, groups and classes, and faculty in effective research methods, often referred to as information literacy skills. Audio-visual equipment service and/or textbook circulation may also be included in a school librarian’s responsibilities. Often, teacher-librarians are qualified teachers who take academic courses for school library certification or earn a master’s degree in Library Science. (Wikipedia)