When is Book Week in 2023? 2nd March - Pop it in your diary! We have book week costumes from age 3 years right up to year 6. Our book week costumes include the Roald Dahl Willy Wonka to The Fantastic Mr Fox – we have Robin Hood & Harry Potter and of course Little Red Riding Hood and giant peaches! Mary Poppins, Gruffalo and Wheres Wally are also very popular. Our Book Week costumes are also ideal for parents & teachers who want to join in with the literacy festivities. We also stock Book Day themed accessories to add to your current costumes at home or to adapt home clothes. World Book Day is celebrated in most primary schools in the UK at the beginning of March and Roald Dahl Day is in early September. We know how busy parents are so we have selected a fantastic range of Book Week costumes to help you dress your little one in the theme of the book. Our World Book day costumes are available on a next day service too.