What's the name of the calendar where you can see a week's fortune on your mobile phone?

The perpetual calendar is the oldest solar calendar in ancient legends of China. In order to commemorate the achievements of calendar compilers for thousands of years, this kind of calendar was named "perpetual calendar".

The perpetual calendar currently in use is an annual calendar that includes or applies to several years [1]. With the development of science and technology, modern perpetual calendars can display multiple sets of calendars such as Gregorian calendar, lunar calendar and trunk calendar at the same time, and can also contain various functional information such as good or bad luck, holidays and reminders. Its carriers include yearbook 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.