"Happy" Memorial Day?

What is the proper etiquette for observing Memorial Day? "Happy" Memorial Day? When someone said that to me, it did not seem right. It is a solemn day of remembrance and appreciation of those who serve and who are serving. I was glad to see that Kenneth Anderson at the Volokh Conspiracy is writing about this here: http://volokh.com/2012/05/27/etiquette-of-memorial-day-observance/