He is examined in Transfiguration and Charms by Griselda Marchbanks, who later says that he did things with a wand she’d never seen before.
Albus Dumbledore sits his N.E.W.T.s
Date circa June, 1899
Certainty Inferred from canon
Location in Canon OP31: O.W.L.s
Type of Event Wizarding world