According to Bulgarian folklore, a person who walks directly under a rainbow will experience a change of gender. – WTF Fun Facts
bulgaria
WTF Fun Fact – Kukeri Costumes
Around New Year and before Lent, those in Bulgarian kukeri costumes walk and dance through villages to scare away evil spirits with their costumes and the sound of their bells. – WTF Fun Facts
Source: https://en.wikipedia.org/wiki/Kukeri