Book Week started in different forms in different places, but generally:
- In the United States, Children's Book Week was first launched in November 1919 as a national literacy initiative to promote children's books and reading.
- In Australia, the first ever Book Week took place in 1945, hosted by the Children's Book Council of Australia. The first theme was "United Through Books".
- In the United Kingdom and internationally, World Book Day was first celebrated on 23 April in 1995, organized by UNESCO to promote reading and copyright.
So, the earliest notable Book Week started in 1919 in the US context, and the Australian Book Week began in 1945. If the user is referring specifically to "Book Week" without a country, these are the main origins and starting points historically. Let me know if it is for a specific region.
