I agree that Vietnam vets were treated very poorly back in the day. I know they were reviled, they were marginalized and looked down on back in the '70s, when the anti-war movement was at its peak. And I agree that of all US vets, they got the short end of the stick as far as respect goes.
But given that, I still can't believe that a guy as media-savvy as I am has never heard of Vietnam Veteran's Day until now, regardless of how deserving it may be. You'd think I would have bumped into it somehow, somewhere by now... even if by accident.