Celebrating the good and battling the evil is the crux of Gathe Mangal.
Long ago, there lived a demon in Kathmandu who had bells on his ears, and for that reason was known as Ghanta Karna. He took great pleasure in hunting down women and children. Everybody was terrified of him but nobody dared to fight against him for he was extremely evil and powerful. During the rainy season, the local farmers needed to go to their fields to sow the seeds and tend the crops. But they were too scared of Ghanta Karna to venture out of their homes.
At last, some frogs came up with a brilliant idea to vanquish the demon. They started croaking at a swamp near the demon’s dwelling. Ghanta Karna got so irritated with the unmelodic sound that he went after them to kill them. But the moment he entered the swamp, he drowned while the frogs remained unscathed. The farmers were so happy that they decided to celebrate the day of victory as Gathe Mangal and worship frogs for their courage and wisdom.