What's wrong with the countdown of solar terms in electronic perpetual calendar?

Version is too low. The loopholes related to the low version of the electronic perpetual calendar can't be fixed, and there will be a phenomenon of jamming or incomplete function in operation, so the electronic perpetual calendar version is too low if the solar terms countdown doesn't run every year. Version is a kind of software running on the device, which can realize the execution, display and management functions of operating system, applications, files and network services.