Sing Something in September or November

Me: "What'd you do in girl scouts today?"

Youngest Daughter: "Oh, nothing really."

Me: "Really? You guys just sat there?"

YD: "Well, no. I colored three pictures and we talked."

Me: "Talked about what?"

YD: "I need a violet or some color shirt because we're going to sing something somewhere in September."

Me: "Sing something in September? Hmmm...September is really far away...are you sure it's not November?"

YD: "Yeah, I don't really know..."

Me: "Um, did you listen to anything they said!?"

YD: ::talking to her sister now:: "Hey C, you know what we did today??"

I give up...