The character of leap years in Gui Mao Yuan calendar
《癸卯元历》自清乾隆七年(1742年)开始在我国行用,直至民国期间的改历,几近200年。
Gui Mao Yuan Calendar had been put into use in China from 1742 to the period of the Republic of China ( 1912 & 1949 ), and its duration is nearly 200 years .