Except I wasn't responding to an interpretation, I was responding directly to what a pp poster said.
I think you are making the same mistake that the pp was making. It doesn't matter if you or I personally celebrate it or not. The subject of this thread is WDW crowds.
Mardi Gras is an international observance, that is observed by multiple major religions, and two states celebrate it as a state holiday, as such, it is going to have an impact on WDW crowds. That's the important part.
I just typed, "Spring holidays USA 2017" into my search engine, and up popped a complete list of every observance and holiday day in the USA -by state. It took me all of 2 seconds.
I daresay, we would all do well to spend more time thinking outside of our own personal bubbles.