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

Differences between calendars: different references, different sources, different grammars and different references.

1. calendar: books with years, months, days, weeks, solar terms, anniversaries, etc. One book a year, one page a day, and withdrawal day by day.

2. Calendar: A book of ancient historians recording political events, which will be released in January. This refers to an annual calendar or wall calendar that records solar terms on one page every month.