Lunisolar Calendar. The Chinese calendar is lunisolar. It is based on exact astronomical observations of the Sun's longitude and the Moon's phases. It attempts to have its years coincide with the tropical year and shares some similarities with the Jewish calendar. In both these calendars, a common year has 12 months and a leap year has 13 ... More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.