As apposed to America, where Christmas is the big event and New Year is rather anti-climactic, In Japan, お正月 Oshougatsu, New Year is the biggest event of the year and has a rich tradition of customs, decorations, and food.
Yuzu Bath Day
Yuzu is a citrus fruit similar to a mandarin orange and looks somewhat like a grapefruit. It is not usually eaten as a fruit, but is well-known in Japan for its medicinal qualities. People traditionally take a bath with yuzu on the winter solstice around Dec. 21st, known in Japan as Toji. Yuzu baths are said to warm the body, ward off colds, and soothe the mind. In addition, yuzu can be cut and soaked in honey to make a marmalade-like syrup that is a folk remedy for colds and a sore throat.