World Book Day is a charity funded by publishers and booksellers in the UK and Ireland. World Book Day, also known as World Book and Copyright Day, or International Day of the Book, it is a charity funded by publishers and booksellers in the UK and Ireland. Also, it is an annual event organized by the United Nations Educational, Scientific and Cultural Organization (UNESCO) to promote reading, publishing, and copyright. The first World Book Day was celebrated on 23 April in 1995, and continues to be recognized on that day.