Sim, há uma breve menção em Harry Potter e o Cálice de Fogo. Aparentemente, é uma tradição conhecida no mundo dos bruxos.
‘No wonder they were glad to get shot of him at the Ministry, did you hear him telling Seamus what he did to that witch who shouted “boo” behind him on April Fools’ Day? And when are we supposed to read up on resisting the Imperius Curse with everything else we’ve got to do?’
HP and the Goblet of Fire - Chapter 15: Beauxbatons and Durmstrang
Descendo o cânone, também houve uma menção a uma brincadeira do Dia da Mentira na versão Gamecube de Harry Potter e a Câmara Secreta .
Stinkitus is a magical disease provoked by breathing the noxious green gas left when one explodes a Stink Pellet. On April 1st, 1979, approximately five-hundred cases of Stinkitus were reported throughout London. This happened because 42-year old Caractacus Phelps dropped no less than eight hundred Stink Pellets from the roof of the Daily Prophet building in Diagon Alley.