Calendar 65438+February 25th, 2022

The calendar of 65438+February 25th, 2022 is the third day of the twelfth lunar month in the year of Renyin.

The perpetual calendar is the oldest solar calendar in ancient legends of China. The name of the perpetual calendar comes from a man named Wannian in Shang Dynasty, who was the editor of this calendar. In order to commemorate its achievements, this calendar was named perpetual calendar. The perpetual calendar used now is an almanac that contains several years or applies to several years.

With the development of science and technology, modern perpetual calendars can display multiple sets of calendars such as solar calendar, lunar calendar and trunk calendar at the same time, and can also contain various functional information such as good luck, holidays and reminders. Its carriers include almanac publications, electronic products, computer software and mobile phone applications, which are very convenient for people to query and use.

Introduction to calendar

Calendars used in the history of China include solar calendar, lunar calendar and yin-yang calendar. The solar calendar, perhaps the earliest calendar used by ancestors, is based on the laws of the sun. The ancients believed that the sun revolved around the earth, and one week was a year. Today we know that it is the cycle of the earth's revolution around the sun, but the ancients knew the opposite.

The lunar calendar is based on the changes of the moon's profit and loss. The period of the new moon is twenty-nine or thirty days, and the length of a year is only an integer multiple of the month, which has nothing to do with the tropical year. The month has nothing to do with the four seasons, and both the Greek calendar and the Hijri calendar belong to this calendar. There can't be double spring and blind year in a year.

Reference to the above content: Baidu Encyclopedia-perpetual calendar