@Leyonhjelm @polarisera "The challenge with COBOL is that it doesn’t have a standardized way to store and work with dates — unlike most modern programming languages. Instead, many dates in COBOL must be coded to a reference number, often using an international standard, Rege explained.
"The most common reference date number is May 20, 1875, under an international standard known as ISO 8601. That means if someone applies for Social Security without a birth date, they may be recorded as 150 years old in the database depending on how a programmer troubleshoots the issue.
"Programmers can overcome these limitations in COBOL’s functionality, but they may also opt to use 1875 as a placeholder for unknown dates if it aligns with the database’s purpose… For example, when the federal government began issuing regular monthly Social Security payments in January 1940, recipients needed to be at least 65 to qualify, meaning they needed to be born in 1875 or before.
"Those who crafted the Social Security database may have, therefore, set 1875 as the default birth year for anyone who lacked that information at the time."