We tracked the issue down to an insert statement which was attempting to set a date field for an employee record with a date of 02/04/2101.

wha?

sounds like ... no, it doesn't. It does remind me of some of the Perl date display silliness of 2000 or so.

Folks had a habit of concatenating and displaying "19100" for the year because they didn't read the docs.

Someone entered it wrong via the 10-key. Oops!

Oopsie.