The SSA's master records, the Numerical Identification (NUMIDENT) files, store dates in text as either CCYYMMDD or MMDDCCYY strings according to their archived versions.
I have a hard time believing the DB2 systems would convert it to days/seconds/whatever since 1875. It's not impossible, but I think whoever came up with the 1875 thing was simply wrong.
That's not to say there are 150 year olds collecting social security either. Dates of birth are sometimes missing or entered wrong and sometimes death records don't get entered. It's also clear DOGE didn't understand that social security numbers can't be used as a unique identifiers (nor why it's unnecessary) which can lead to all sorts of issues when processing.
Edit: It also seems the SSA presumes anyone over 115 is has died and halts payments which makes it even more unlikely there are 150 year old beneficiaries: https://secure.ssa.gov/poms.nsf/lnx/0202602578
https://www.openicpsr.org/openicpsr/project/207202/
I have a hard time believing the DB2 systems would convert it to days/seconds/whatever since 1875. It's not impossible, but I think whoever came up with the 1875 thing was simply wrong.
That's not to say there are 150 year olds collecting social security either. Dates of birth are sometimes missing or entered wrong and sometimes death records don't get entered. It's also clear DOGE didn't understand that social security numbers can't be used as a unique identifiers (nor why it's unnecessary) which can lead to all sorts of issues when processing.
Edit: It also seems the SSA presumes anyone over 115 is has died and halts payments which makes it even more unlikely there are 150 year old beneficiaries: https://secure.ssa.gov/poms.nsf/lnx/0202602578