Being somewhat familiar with referencing of academic papers as a source, it has struck me as odd why authors would leave out some date on their paper. The date could be the day the author completed the paper on or submit date or published date etc. Certainly it would be of help to others who would want to reference their work? So, does anyone know if there is a specific reason why certain authors leave out a date on their papers?
Typically the date information is added by the journal.
In my experience most of the published work that is out there without dates comes from conference proceedings, where this information is given on the front cover but not on individual papers. I agree that it is a problem.