October 3rd is a holiday for Fullmetal Alchemist fandom, though I'm not sure there's an agreed-upon name -- DON'T FORGET day?? Fullmetal Alchemist day? I usually just see it with something like that plus/or the relevant manga panel or anime screencap. (It's the day Ed and Al tried to do human transmutation, which we know because Ed has "3 OCT 11 DON'T FORGET" carved into the inside of his State Alchemist watch.)

I was going to mention Barricade Day, but then I remembered how to read and saw you already had it. :p