Calendar key ring 50 - years KR61 Wed. 3.6cm 50-year calendar - years 2005-2054. It allows you to read what the day of the week will be on any of the days in the years 2005-2054. It is possible thanks to the rotating disk. We set the desired year above the appropriate month and in the window at the bottom we read the day of the week shown above the day number.