Introduction to perpetual calendar

The perpetual calendar is the oldest solar calendar in ancient legends of China. In order to commemorate the achievements of the compilers of perpetual calendars, this calendar was named "perpetual calendar". But the perpetual calendar used now, that is, almanac 1, includes 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. Ten thousand years is just a symbol, indicating a long time span.