Every country has it's own traditions, here in Turkey, but I believe also in Italy and Spain, they wear new red underwear on New Year's eve for good luck!
As I am from Belgium myself I only found out about this while shopping with a friend the last day of the year a few years back and she all of a sudden goes like hold on, I need to get me red underwear for tonight... I was a bit surprised then saw all the pretty bras and panties in the stores and she explained it to me. I think it's a fun tradition and hey, why not! Red is sexy!
HAPPY NEW YEAR!!
Wishing you all good luck!!
..and don't forget to be awesome!