A hundredth anniversary, also known as a centennial, marks the completion of one hundred years since a significant event. This milestone is often celebrated with special ceremonies, gatherings, and activities that honor the history and achievements associated with the event. Examples include the founding of a city, the establishment of an organization, or the publication of a landmark book. Centennial celebrations can include various forms of recognition, such as parades, exhibitions, and commemorative publications. These events provide an opportunity for communities and individuals to reflect on the past, celebrate progress, and look forward to the future. They often emphasize the importance of heritage and continuity in society.