Decorating the Library
There would hardly be any event that is celebrated without decorations. Since the School Librarian Day has a lot to do with the School Library, so you can go ahead and decorate the library in a fancy way. One good idea would be to write HAPPY SCHOOL LIBRARIAN DAY on the wall or the entrance of your school library using some artistic stuff.
There could be a number of books in your school library but if you could just add a few more to the shelves, it will be something significant in terms of School Librarian Day celebrations. Try finding some good books in the market, making sure that they are not available in your library, and donate them to your school library.
Tribute to the Librarian
Unlike teachers in a school, the librarian who works hard to take care of a number of books rarely gets any appreciation. Hence, it will be a good gesture if you show some appreciation and regard to your librarian by simply giving him/her a thank you card for all the hard work and dedication.