Who created the calendar? When was it created?

The calendar displays the date of the day in large letters, with predictions of the day's festivals and fortunes.　The real calendar was created about 1,100 years ago in the first year of the reign of Emperor Shunzong Yongzhen of the Tang Dynasty, when the imperial calendar was already in use in the imperial palace. Initially, one page a day was used to record the state and court events and the emperor's words and deeds. The imperial calendar was divided into twelve books, each with the same number of pages as the number of days in a month, with the number of days and the date indicated on each page. Developed later, the month and day, the dry branches, festivals and other content written in advance in the above, the lower part of the blank space to be remembered, and now the "calendar" similar. At that time, the eunuchs serving the emperor in the calendar blanks to write down the emperor's words and deeds, to the end of the month, the emperor examined and proved to be correct, sent to the historians archives, which at that time called the calendar, these days. Calendar later as the historian to write the "national history" of the basis.　Later, the court ministers have followed suit, the preparation of their own use of the calendar. As for the monthly calendar later developed into wall calendars, desk calendars and other forms, just nearly a century. With the development of the times, - despite the increase in the variety of calendars and the renovation of the pattern, but still maintains the pattern of the old calendar.

Edit this paragraph calendar classification

Calendar is also divided into lunar solar calendar. The solar calendar is also known as the solar calendar, the calendar year for a return year, the current international common calendar (Gerry calendar) that is a solar calendar, also referred to as the solar calendar; the lunar calendar is also known as the lunar calendar, or the lunar calendar, the calendar month is a solstice, the calendar year for 12 solstice, the big month of 30 days, the small month of 29 days, the Islamic calendar that is a type of the lunar calendar; the average lunar and solar calendars for the return of the calendar year for a return year, the calendar month for the solstice, because of the 12 solstice and the return year, the calendar month for the solstice, the lunar calendar is the solar month. Because the difference between the 12 lunar months and the regression year is too big, the intercalary month is set in the lunisolar calendar, so this kind of calendar is in line with the moon phase, and also in line with the earth's cycle movement around the sun. The Chinese lunar calendar is a type of yin-yang calendar.

Editing this paragraph Calendars are common

Later on, as calendars brought many conveniences to life, they gradually entered the families of many big officials in the dynasty, and after some changes, they were compiled into their own calendars. Later, with the calendar to the masses, the development of the family, people will also be on the calendar of the dry months, festivals and the zodiac are printed on the calendar, and leave a large space for remembering things.　As for the monthly calendar later developed into a wall calendar, desk calendar and other forms, just nearly a century.　With the development of the times, despite the increase in the variety of calendars, patterns are also constantly renovated, but still maintain the pattern of the old calendar.

Edit this section of the calendar production process

Calendar calendar desk calendar calendar calendar can be divided into two parts of the later work, the cover process production and bracket process production.　Cover process can be divided into three steps: First, the cover UV, refers to the cover surface coating (or spray, or print) on a layer of colorless transparent paint, so that the surface of the cover to form a thin and uniform transparent glossy layer. Can protect the printed content of the calendar, but also play an aesthetic role. It can play a role in making the printed materials more glossy and the visual effect is remarkable. Cover intaglio printing, that is, through a close fit of a piece of intaglio and a piece of convex plate, clamped cover, under a certain pressure, so that the surface of the cover to form and convex plate similar to the graphics or patterns, so that the printed matter has a clear sense of relief. Cover lamination is a processing technology in which the plastic film is coated with adhesive and bonded together with the cover by heating and pressurizing. Cover after lamination, due to the surface of an additional layer of plastic film, smoother, and gloss and color firmness is also better, the graphic color is bright and rich in three-dimensional sense, but also has a waterproof, anti-fouling, wear-resistant folding, corrosion-resistant function. These are the basic steps in the production of the cover.　Bracket production can be divided into two aspects: on the one hand, hot stamping, borrowing a certain pressure and temperature stamping machine on the plate, the metal aluminum foil or color aluminum foil according to the stamping stencil graphics transfer bracket. Hot pressing, mainly applied to wooden bracket, using high-density high-quality wood board as the top layer board, using artificial board as the core layer substrate (two-layer structure of the bottom layer material), using low-density cheap board as the bottom layer board, in the general-purpose hot press for pressing, so as to generate low-cost, good appearance and performance of the bracket material. [1] If dates are used as a resource, then a manufacturing calendar is a date-based capacity requirement plan. A manufacturing calendar is a calendar that clearly indicates work dates, rest dates, and is sometimes referred to as a work calendar. Manufacturing calendars serve the following purposes: as a basis for attendance calculations; as a basis for determining start dates and completion dates when calculating master production schedules and job schedules based on lead times in MPS and MRP; as a date basis for calculating capacity loads in work centers; and as a basis for the determination of the date of financial realization. There are two types of manufacturing calendars, namely, single manufacturing calendars and complex manufacturing calendars. In an enterprise where the same manufacturing calendar is used for both the production and management departments, and for both the work centers that perform surface processing operations and those that complete product assembly operations, the manufacturing calendar of such an enterprise is called a single manufacturing calendar. In an enterprise, due to environmental constraints such as energy consumption, etc., and management needs such as equipment maintenance, etc., it is possible for different departments and work centers to have different manufacturing calendars due to the use of different production dates and rest dates. The manufacturing calendar of such a company is called a complex manufacturing calendar.　For an enterprise with a complex manufacturing calendar, manufacturing calendars at different organizational levels have different priorities. The work center at the lowest organizational level has the highest priority manufacturing calendar, and the enterprise at the highest organizational level has the lowest priority manufacturing calendar. That is, if a manufacturing calendar is defined on a work center, then that work center uses its own manufacturing calendar. If a work center does not have its own manufacturing calendar defined, then it uses the manufacturing calendar of the department to which it belongs. If the department does not have a manufacturing calendar either, then the work center uses the corporate manufacturing calendar.　It has been suggested that manufacturing calendars be organized by serial number to facilitate lead time calculations. In the opinion of the authors, this suggestion is inappropriate. First, for computers, there is little difference in the complexity of calculating lead times, whether by date or by number, and second, if by number, then the management of the calendar numbering resource is an additional human endeavor.