dayA calendar is a daily publication used to record time. A calendar that displays a day is called a calendar, a calendar that displays a month is called a monthly calendar, and a calendar that displays the entire year is called an annual calendar. There are many forms, such as hanging calendars, desk calendars, annual cards, etc. In recent years, there are also electronic calendars. The calendar has several different meanings from ancient times to the present, 1. Like almanacs. 2. Today, it refers to a notebook that records the year, month, day, week, solar terms, and anniversaries, etc. ?o one book a year? ?o one page a day? ?o revealed daily. There are those hung on the wall? ?o and those placed on the table. 3. The official records the daily affairs of the court according to the day. It is the basis for the official to compile the national history.The calendar is often decorated with images, and month-cards are one type of decorative paintings for calendars.
 Now, the calendar and desk calendar that are essential for each family are derived from the development of the calendar, but this is only a history of hundreds of years. As to when the calendar appeared, no one can say for sure, but according to historical records, it was used in the imperial palace around 1100 years ago during the first year of Emperor Shunzong's reign. At that time, the calendar was also known as the imperial calendar, which not only records the date but is also an important material for compiling national history. The calendar at that time was similar to what it is now. The year was divided into 12 volumes, the number of pages in each volume was determined according to the number of days in each month, and the month and date were written on each page, and then handed over to the eunuchs who served the emperor to temporarily keep. At the end of each month, the eunuchs would record the emperor's words and deeds on the empty pages and then submit them to the emperor for inspection after the month. After approval, they were sent to the historians for archiving.
 The historical records will then combine the content of the calendar with major events in the court and throughout the country, after refining and polishing, they are recorded, thus becoming the national history. Later, as the calendar has brought many conveniences to life, it gradually entered the homes of many high-ranking officials in the court, and after some changes, it was compiled into their own family calendars. In the future, with the development of the calendar toward popularization and familyization, people also printed the lunar branches, lunar months, solar terms, and auspicious days on the calendar, and left a large blank for note-taking.