If you want to do bunko holiday themes, I think it would be fun to use red and green bunko dice for Christmas time, orange and black for Halloween, and pastel dice for Spring.
Red and white or Pink and white - Valentine's Day Green - St. Patrick's Day Yellow, Purple and Green - Mardi Gras Red White and Blue - Any national holiday or July 4th Orange and Black - Halloween Red and Green - Christmas Black and White or Silver - New Years Eve