It is a name of traditional Chinese day. You may don't know the first month in China is called "yuan " . Yuan is a Chinese word that means "new things " . And the first day we named "Dan " ,means "born" . So "Yuan Dan" means the new year will start . We celebrate it as honor our ancestors, do some special things like boating, tripping .And when 02.09 come. We say Chinese year is already arrived.
Chen