Thinking Quick...ish
The context: it is a couple days ago, a great time for appropriating other cultures.

Someone Else: You are wearing red today!
Me: Yes! I was feeling festive!
[ed. note: this was a lie; As with most things I do, I was wearing red for absolutely no reason at all. But that is *boring*.]
Someone Else: *looks confused*
Someone Else: About, uh, what?
Me: *vaguely remembers the note in the comics shop explaining the comics would be late this week*
Me: Memorial Day! :D

Yes, thank you. I am amazing. (Unless that is actually how Memorial Day is done? It could be! In which case, thank you, I *am* amazing!)