>I'm curious who's country celebrates May 9 as a national holiday and the World War II Victory day?

Nobody I know around here. We should, but then it would be May 8 V/E Day. Victory Day (May 9) would be for Russians as the Germans surrendered to the Russian Army a day later. But on this side of the pond I would say that a huge percentage of the population has no clue of what we are talking about. Sad. (But we do celebrate a non-entity as Cinco de Mayo. Go figure).