Love those shirts...I like the dates, but find them harder to wear after the events!
I have quite a collection!
From what I’ve been reading online, there may be more “Flaunt the Flag” days, I’ve heard the date September 16th bandied about (that’s “deis y seis de Septiembre”, Mexico’s Independence Day, their big holiday).
The website is neat because you can put whatever text you want on the t-shirts, etc. So you don’t have to put a specific date, you could just put the title and wear the shirt multiple times. :-)