I've seen this before, too. I'll guess it's related to the computer programming language or operating system this site runs on.
The UNIX birthdate is 01/01/1970, and for many an OS and/or programming language, the concept of time starts there. Put in some sort of (i.e. date - 1) algorithm, and there's your 12/31/1969.
The UNIX birthdate is 01/01/1970, and for many an OS and/or programming language, the concept of time starts there. Put in some sort of (i.e. date - 1) algorithm, and there's your 12/31/1969.