Even now, I can thrum the fingerings on the desk. The first few bars of the first movement of Moonlight Sonata along with the opening of Beethoven's Fur Elise may well be the last knowledge to leave my brain. Yes, it's that bad.
I wore an aqua-colored dress with a white collar at the recital where I performed Moonlight Sonata. And I think I performed it relatively mistake-free.
My teacher was unorthodox, so recitals were mercifully few and far between. But of the handful I had, on at least one or two occasions I had to start over when mistakes derailed me.
Moonlight Sonata was not one of those times, though ... because it was then and forever will be, embedded in my brain.
(Title page of the first edition, courtesy Wikipedia)