The annual event was celebrated throughout the Wakefield district with hundreds of school and nursery children joining in the fun of the international celebration of books and reading.
The whole school dressed up for the day as characters from their favourite books.
World Book Day was created by UNESCO in 1995 and now is marked in more than 100 countries. The first World Book Day in the UK and Ireland took place in 1997 to encourage young people to discover the pleasure of reading.
Stanley St Peter’s Primary School shared a selection of photos from day – take a look at these incredible costumes.