100th birthday anniversary
Used for the centennial of a person's birth, often in commemorative contexts such as exhibitions or memorial events.
Next year marks the 100th anniversary of the author's birth.
生誕 means 'birth' (formal), while 生誕百年 specifically refers to the 100th anniversary of a birth.
百年祭 is a centennial festival or ceremony, not necessarily tied to a person's birth.
Compound of 生誕 (birth) and 百年 (one hundred years).