Calendar reform refers to the process of changing the way we organize and measure time, specifically the structure of the calendar itself. This can involve altering the number of days in a month, the names of the months, or the overall length of the year. The goal is often to create a more consistent and logical system that aligns better with natural cycles, such as the lunar or solar year. Throughout history, various proposals for calendar reform have emerged, including the introduction of the Gregorian calendar in 1582, which corrected inaccuracies in the previous Julian calendar. Other notable proposals include the World Calendar and the International Fixed Calendar, which aim to simplify the calendar for global use.