Why do we have all these national days?

A national day was made to commemorate the birth of a nation. It's really a big deal. Today is national Mac & Cheese day. That is not a big deal.  Don't get me wrong, I ate a lot of mac and cheese in my day, I just don't know why we make a deal about it.

I found lots of websites talking about all of the national days. But I didn't find one that told me why. Not one that told me why it's National Nude, Grand Mariner, Tape Measure , and Collector Car Day today.

I get all these things are very cool, but the only reason I can think of is commerce. If you do it for one thing, you have to do it for all the things. There are so many that we have 4-5, usually unrelated, days...every day. Over 1500 national days.

How about national day day...when do we get that. A day on which we celebrate all the other days. Then we could just put all the days in that day, and not have any more.

That said, I will be sitting in my collector car this evening eating mac & cheese, drinking Grand Mariner, while measuring for new door caps. Guess if you can't beat them join them. Wonder if we have any local days to add to the list. Anyone got a list for that?