The Monkey King Festival, is celebrated in China on the 16th day of the eighth Lunar month of which traditional,  lunisolar calendar which reckons years, months and days according to astronomical phenomena?
Monkey King Festival The Monkey King Festival () is celebrated in China on the 16th day of the eighth Lunar month of the Chinese calendar, corresponding to September according to the Common era calendar, a day after the Mid Autumn Festival. The origin of the festival is traced to an epic novel titled "Journey to the West" (Xiyou Ji, 西游记) written by the Chinese novelist Wu Cheng'en (1500–1582) in the 16th century during the Ming Dynasty (1368–1644). The novel brings out the concept of immortality from Taoism and rebirth from Buddhism. The monkey Sun Wukong, a character in the novel, is the featured figure of the festival.
Lichun The traditional East Asian calendars divide a year into 24 solar terms. Lìchūn, "Risshun", "Ipchun", or "Lập xuân" is the 1st solar term. It begins when the Sun reaches the celestial longitude of 315° and ends when it reaches the longitude of 330°. It more often refers in particular to the day when the Sun is exactly at the celestial longitude of 315°. In the Gregorian calendar, it usually begins around February 4 and ends around February 18 (February 19 East Asia time). It's also the beginning of a Sexagenary cycle.