What's the difference between Black Thursday and Black Tuesday?

Black Thursday - October 24 1929; new york stock exchange crashed. banks and investiment companies bought large block of stocks around like 12.9 million; ending of the roaring twenties and beginning of the great depression.

black Tuesday - October 29 1929; the wrost features of black Thursday. therefore black Tuesday market suffered loss about 12 percent after hitting up over 16.4 million shares were trade.