On 17 October 1995, Calment reached 120 years and 238 days to become the "oldest person ever" according to Guinness World Records, surpassing Shigechiyo Izumi of Japan, whose claim (120 years 237 days old at the time of his death on 21 February 1986, Calment's 111th birthday) has since been discounted. Calment also holds the record for being the oldest living person for the longest period of time, by far – with nearly nine years and seven months, counting from the death of Florence Knapp on 11 January 1988, to her own death on 4 August 1997.