What is semi centenial?

Semi centennial refers to the 50th anniversary of an event or occasion. For example, the semi centennial of a company would celebrate its 50th year of existence. It is also referred to as a "golden anniversary" as it is a milestone accomplishment that is celebrated with great fanfare and ceremony. Some common ways to commemorate a semi centennial include holding a special event or ceremony, creating a commemorative plaque or monument, organizing a reunion of individuals who played a significant role in the event or occasion, and publishing a special edition or book. Overall, semi centennial celebrations are a way to honor and celebrate significant accomplishments and milestones.