Going away parties

We had two parties to help us say goodbye to friends.  One for family and friends and one for co-workers.   The first was friends and family from school and the neighborhood.  The kids played, the adults talked and it was a lot of fun.  There was much discussion about the Indian Massage post and a few people were turning red.  The kids played Wii and ran around and a few watched the Olympics.  Nothing fancy, just friends hanging out.   However, what struck me most was how many of the people who came were people I had not seen in years.  I loved seeing them but thinking back I wish I would have thrown more parties to see these people more often.   I know I don't have more parties because they are a lot of work and I sometimes think that no one will come because we are all so busy.  I almost dread getting a Christmas invitation because there is so much going on at that time.  However, I think my goal in the years to come will be to have at least one party a year to celebrate something.  Maybe some of the lesser holidays no one else throws a party for and then, maybe people will not be too busy to come.  Maybe I will do Presidents day first since N likes them so much?  Help me to decide.

What holiday do you think deserves a party but rarely gets one?