It is Sunday and we are working. Before they adopted the Western-style week, the Chinese originally used a ten-day cycle known as a 旬 xún in ordering their daily lives and activities. Although the Christian week with the Sunday was not unknown (for instance, it was known from contact with the Jesuits in the 16th-18th centuries), the seven-day week as we know it first became widely familiar in the 19th century with the coming of traders and missionaries from Western powers. It was finally officially adopted by the Chinese government in 1912, after the fall of the last Imperial dynasty.
Even with a 7-day week, there are still differences of interpretation : is Sunday the first day or the last day of the week? International operator that I am, I’ll go with the international standard ISO 8601 that stipulates Sunday to be the seventh and last day of the week.
The picture is a depiction of Máni, the personified moon, and his sister Sól, the personified sun, from Norse mythology (1895) by Lorenz Frølich. [Source : Wikipedia]