actually, we use both calendars. The worldwide calendar is used in daily life, i mean we use it most time, while the lunar calendar is used for celebrating some chinese traditional festivals, such as mid-autum day, spring festival and so on.

Why do you like to use lunar calendar in China? It was not until January 1st, 1912, when Xinhai Revolution had been finished and ever since then the Gregorian calendar was finally put in use in China. So before that we had kept using our own calendar for a great many years. Perhaps lunar calendar is now still used in some rural areas owing to its close connection with agriculture. http://baike.baidu.com/view/284.htm But, precisely our traditional calendar is not a pure lunar calendar but a Lunisolar calendar, because it uses both the units of synodic month and the topical year.(?) 见P.843 ,王力,《古代汉语》第三册,2005年,中华书局 And the origin of Chinese lunar calendar? I think there has been no final verdict yet. 1.Record the days:干支纪日法 2.Redord the months:序数纪月法 3.Record the years:年次纪年法:岁星纪年法,太岁纪年法;干支纪年法 见P.847-855 ,王力,《古代汉语》第三册,2005年,中华书局 http://en.wikipedia.org/wiki/Chinese_astrology http://en.wikipedia.org/wiki/Chinese_calendar

u can learn it in history,then you will know the advantange of it It means a lot.It's so long a history that my English is not afford

yea... we use both... well... u can read about the history etc here http://en.wikipedia.org/wiki/Chinese_calendar