Feiertage is a free Android application developed by Jan Karow, designed to calculate and display the federal holidays based on the selected year. The program provides the calculation of all holidays, and therefore, there is no need for any updates. Additionally, the application displays the holidays of the next ten years and the past three years.

The interface is clean and straightforward, with no confusing features or unnecessary options. The program's main window has a drop-down menu that allows the user to select the desired year. After choosing the year, the program immediately displays all the federal holidays for the selected year. The application's simplicity makes it easy to use for everyone, including people who are not tech-savvy.

Feiertage is a useful application for anyone who wants to know the exact dates of federal holidays. It is an excellent tool for planning vacations or scheduling workdays. The program's accuracy and ease of use make it a must-have for anyone who wants to stay up-to-date with the federal holidays.