A day for macaroni salad

Today, and January 11th annually, is macaroni salad day マカロニサラダの日. I had never seen a "macaroni salad" until I came to Japan. And I certainly had never made one. I think it is a Japanese thing, but do correct me if I am wrong! 

Japanese macaroni salad became widespread in the postwar era, when Western-style dishes (yōshoku) blended with Japanese tastes. And since then it has been used widely in homes. Its a common side dish with Japanese dinner. And sometimes you get it in bento boxes, school lunches, and restaurants. In addition, you can buy premade macaroni salad in supermarkets and even convenience stores.

The macaroni salad in the photo in this post was a side on a restaurant meal. You can't really see it in the photo, but the key ingredient is macaroni pasta! The pasta is usually prepared to be softer than al dente. Japanese mayonnaise, is also a key ingredient. In addition, it also includes crisp vegetables. Cucumber is particularly popular. It often also has egg, corn and ham in it too. 

Do you eat macaroni salad? Is it something that is eaten / available in your home country too?