Oops! 101-year-old woman isn't actually Facebook's oldest user[ Thu, 30 Aug 2012 15:55:36 GMT ]It's understandable that Facebook COO Sheryl Sandberg thought that 101-year-old Florence Detlor is the social network's oldest user. After all, Lee Stern had mistakenly set her date of birth to Aug. 18, 1913. In reality, Stern was born on Aug. 24, 1910 — making her 102 years old.