The Timmonium show is always on the third Saturday and Sunday of March, so its easy to remember (for me, at least, since it conflicts with another annual event on the 3rd Saturday in March that I can not always get out of).
That makes the EAA symposium the third Friday and Saturday of every March.
I should have some good dha to show this year. I also have located and bought my great-great grandfather's Civil War dress sabre (Union, which makes it dicey to technically live in Confederate territory). [Yep, Rick, I got it after all! The story just kept getting nuttier ...]