<P> In Sweden, the day is known as Världsbokdagen ("World Book Day") and the copyright aspect is seldom mentioned . Normally celebrated on 23 April, it was moved to April 13 in the year 2000 and 2011 to avoid a clash with Easter . </P> <Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2014) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2014) (Learn how and when to remove this template message) </Td> </Tr> <P> In the United Kingdom, World Book Day is held annually on the first Thursday in March, as 23 April sometimes clashes with Easter school holidays; 23 April is also the National Saint's Day of England, St George's Day . A separate event, World Book Night, organized by independent charity The Reading Agency, is held on 23 April . </P>

What is the history of world book day