When I was a child, we planted the entire vegetable garden at once, over Memorial Day weekend. Finally it was warm enough to start thinking about planting, and it was a long weekend.
Warm enough, you ask? Indeed. I am talking about 45 years ago when there could be snow in Connecticut in May. Frequently there were killing frosts. So Memorial Day weekend was not only family time, for being together and honoring those who had made sacrifices for our country, but it marked the true beginning of the summer growing season.