World's strangest new year traditions.

Mircea Costina / Alamy Quick question: What will your wardrobe be on New Year’s Eve? Nice dress? Black tie? How about your, ahem, underwear? If you lived in parts of South America, it wouldn’t even be a question. In São Paulo, La Paz, and other spots, people don brightly colored underpants to ring in the New Year—red if they’re looking for love, and yellow for money.