Do you know where the "calendar" comes from?

The prototype of calendar is a kind of "debt collection book". It was in ancient Rome, when a man specialized in lending money and charged the debtor interest on a monthly basis. For convenience, they recorded the date and month when someone should repay the debt and interest. Because this kind of notebook is arranged by month and date, there is a note column, and its note-taking method is simple and clear, which is gradually used for reference by other industries.

Mo Zaoquan, the second Chinese comprador of Taikoo foreign firm, a famous British businessman in Hong Kong, built a sugar factory after taking office. 1884 launched a "monthly card" similar to a poster to promote the products of Swire Sugar Factory. Mo Zaoquan specially hired designer Guan Huinong to design these pictures, most of which are flowers, auspicious figures, blessings, luck, longevity, happiness, ancient God bless the people of China, welcome the Spring Festival blessings and pictures of ladies. Anyone who buys Taikoo Sugar will be given a frame of "Monthly Card". Later, many manufacturers competed to print free "monthly cards" and constantly improved their forms. With the passage of time, "debt collection book" and "monthly card" gradually evolved into today's calendar.