World Book Day is nearly upon us again. In its 20th year, the day, which is designated by Unesco as a worldwide celebration of books and reading, is marked in more than 100 countries.

It has become one of the highlights of the school calendar and one of the main reasons, aside from that book token children receive to buy a new book of their own, is that everyone gets to dress up as their favourite fictional character.

Each year classrooms are filled with Little Red Riding Hoods, Harry Potters, Oompa Loompas, Peter Pans, Horrid Henrys and Very Hungry Caterpillars – and that’s just the teachers.

We know from previous years just how creative the teaching staff can be when it comes to their World Book Day costumes – so we would love to see what you’re wearing this year.

Send us a photograph of you or your colleagues wearing your outfit in all its glory and tell us a bit about what you’re doing with your class to celebrate. If children appear in the picture, please make sure you have permission from the parent or guardian.

How to contribute

You can share your photographs or videos of your World Book Day costume by clicking on the blue “contribute” button on this article or you can download the free GuardianWitness app if you have a smartphone. Please use the description field to tell us more about the photo or video.

• GuardianWitness is the home of readers’ content on the Guardian. Contribute your video, pictures and stories, and browse news, reviews and creations submitted by others. Posts will be reviewed prior to publication on GuardianWitness, and the best pieces will feature on the Guardian site.