National Library Week in USA
National Library Week in USA is held on April 13. Conducted from Sunday of the first full week of April. This event in the second decade of the month April is annual. 
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One of the most overdue library books in the world was returned after 122 years. Librarians used to have to learn a specific style of handwriting called “Library hand”. The oldest library in the world dates from the seventh century BC.
National Library Week is an annual celebration highlighting the valuable role libraries, librarians, and library workers play in transforming lives and strengthening our communities. In the mid-1950s, research showed that Americans were spending less on books and more on radios, televisions and musical instruments.
First sponsored in 1958, National Library Week is a national observance sponsored by the American Library Association (ALA) and libraries across the country each April.
Similar holidays and events, festivals and interesting facts
School Library Month in USA on April 1
National Autism Awareness Month in USA on April 1
Teacher's Day in Ecuador on April 13 (Día del maestro);
National Student Leadership Week in USA on April 20
Public School Volunteer Week in USA on April 22 (it provides a yearly opportunity for schools and families to honor and highlight the powerful contributions parents and caregivers provide at school and home to support student success. Held from Monday of the last full week of April);
School Nutrition Employee Appreciation Week in USA on April 28 (Begins on the last Sunday of April);
National Children’s Book Week in USA on April 29 (Starts on the last Monday of April)