You cite two COBOL implementations which use 1582 or 1600/1601 as epoch dates – that's not evidence that any COBOL uses 1875-05-20 as an epoch date. Then you c

You cite two COBOL implementations which use 1582 or 1600/1601 as epoch dates – that's not evidence that any COBOL uses 1875-05-20 as an epoch date. Then you cite an pseudonymous Reddit comment which claims they've seen a COBOL implementation using 1875-05-24 (not actually 1875-05-20, although maybe they meant to say 20 and the 24 is a mistake) – but can't even tell us what it is named. Maybe, somewhere out there, is a COBOL implementation which actually does use 1875-05-20: but if nobody can name it, we don't even know that it exists. And even if someone actually succeeds in digging up the name of a COBOL implementation using 1875-05-20 as an epoch date, can we be sure that is actually the COBOL implementation SSA is using?