NATIONAL RAT CATCHER’S DAY | July 22National Rat Catcher’s Day on July 22nd commemorates the story of the Pied Piper of Hamelin. The day also provides an opportunity to thank all present-day exterminators.According to the folktale, residents of the German town of Hamelin hired a strangely dressed man to rid their village of rats. The Pied Piper of Hamelin did so by playing his flute. Upon finishing the task, the townsfolk refused to pay — so the Pied Piper returned. Once again, the Pied Piper played his flute while the children followed him. And with the Pied Piper, the children vanished, never to return. Let's get more detail from the net source .