Chinese calendar may refer to any of the official and civil calendars used in China and some neighboring countries in different periods of history; however, the phrase is generally synonymous with Han calendar.
The official calendar in China today is the Gregorian calendar, which is a solar calendar. It is used for public and business affairs.
The civil calendar in much of China is the Han calendar, which is a lunisolar calendar. It is used for selecting the day of a wedding or funeral, for opening a venture, or a relocation.
The Han calendar is a lunisolar calendar, which indicates both the moon phases and the solar terms. In Han calendar, a year usually begins on the second dark moon after the winter solstice but occasionally on the third dark moon after the winter solstice.