mathsparks:i thot this dong zhi last for a month? :? like dumpling fest? is this the festival, where according to the chinese, you all grow 1 year older? then how abt 7th day of LNY, isn't that ren ri. also everyone's bday?Did some research on dongzhi.Andaiz is right, only one day.But according to Nat Geo, it was on 21 dec this year, the day i instinctively ate tang yuan without knowing it!http://news.nationalgeographic.com/news/2009/12/091221-winter-solstice-2009-first-day-winter-shortest-day-year.html