Editing Week (section)

====China and Japan====
The earliest known reference in Chinese writings to a seven-day week is attributed to Fan Ning, who lived in the late 4th century in the [[Jin dynasty (265–420)|Jin dynasty]], while diffusions from the [[Manichaeism|Manichaeans]] are documented with the writings of the Chinese Buddhist monk [[I Ching (monk)|Yi Jing]] and the Ceylonese or Central Asian Buddhist monk [[Amoghavajra|Bu Kong]] of the 7th century ([[Tang dynasty]]).

The Chinese variant of the planetary system was brought to Japan by the Japanese monk [[Kūkai]] (9th century). Surviving diaries of the Japanese statesman [[Fujiwara Michinaga]] show the seven-day system in use in [[Heian Period]] Japan as early as 1007. In Japan, the seven-day system was kept in use for astrological purposes until its promotion to a full-fledged Western-style calendrical basis during the [[Meiji Period]] (1868–1912).