Oh man, reminds of the time I was working on an intranet app for a big furniture company and all test user signups were coming through as 01/01/1970. After several frustrating hours trying to track down the source of the error I had the client enter a new user in front of me to see why it was happening for them & not me. I watched in horror as he set the birth date to January 1st 1970.
He had some limited exposure to development in the past and had got into his head that this date was the Universal Developer Test Date.
Any system administrator looking at that will either be amused or search for the error in his date time parser.