isn't it Dec-30-1899?
since this CDate(0).
and Format(CDate(0),"mm/dd/yyyy") = 12/30/1899
this is what CoPilot explains:
In Microsoft Access, 01/01/1900 is often seen as a default or placeholder date—but it’s not the true "zero date" in Access. That honor actually goes to December 30, 1899...