Children's Book Week starts today, May 11th, and runs through Sunday, May 17th. It's sponsored by the Children's Book Council, a consortium of publishers. The event's web site says,
Since 1919, Children's Book Week has been celebrated nationally in schools, libraries, bookstores, clubs, private homes-any place where there are children and books. Educators, librarians, booksellers, and families have celebrated children's books and the love of reading with storytelling, parties, author and illustrator appearances, and other book related events.