A little information abour chinese spring festival:
The Chinese calendar is based on a combination of lunar and solar movements. The lunar cycle（月运周期）is about 29.5 days. In order to "catch up" with the solar calendar the Chinese insert an extra month once every few years (seven years out of a 19-yearcycle). This is the same as adding an extra day on leap year （闰年）. This is why, according to the solar calendar, the Chinese New Year falls on a different date each year.
New Year's Eve and New Year's Day are celebrated as a family affair, a time of reunion and thanksgiving. The celebration was traditionally highlighted with a religious ceremony given in honor of Heaven and Earth（万物）, the gods of the household and the family ancestors.
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