What's the difference between a calendar and a wall calendar?

Calendar: a single printed matter with date, week, solar terms, etc. Printed every month of the year.

Calendar: The prototype is a kind of "debt collection book". With the passage of time, the "debt collection book" gradually evolved into today's calendar. Calendar evolved from imperial calendar, monthly calendar and New Year pictures, and it is a work of art combining almanac and New Year pictures. The advent of calendar changed the traditional calendar and calendar timing method in China. At the end of last year, every household bought several pictures of almanac and posted them in the room for one year. Every day looks the same, but the calendar has 12 months 12 different pictures, which are exquisite and generous, giving people a sense of freshness every month, and guests often double when they come.