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What is the 100th birthday celebration called? All about the centennial milestone

Less than 1% of the population reaches the age of 100, making it an extraordinary achievement. This momentous occasion has a special name, so if you're wondering, "What is the 100th birthday celebration called?" the answer is a centennial or centenary celebration. This milestone honors a century of life, wisdom, and memories, and it is marked with unique customs and significant fanfare.