The "萬年曆 - 十三行作品" app offers a comprehensive calendar tool with features such as Western and Lunar date conversion spanning from 1850 toUsers can easily search for specific dates and times in Western or Lunar calendars. The app provides information on the Heavenly Stems and Earthly Branches for years, months, days, and hours, along with the timings of solar terms, Chinese festivals, and public holidays in China, Hong Kong, Taiwan, and Singapore.

The interface is available in Traditional and Simplified Chinese, catering to a wide range of users. For those interested in providing feedback, the developer encourages reaching out via email at or leaving comments on the App Store.