This four word phrase is used to refer to the famous bash that ended the September 28, 1938 game between the Pirates and the Cubs. This Gabby Hartnett walk-off won the game for the Cubs and pushed them ahead of the Pirates in the standings; a lead they would (in very un-Cublike fashion) not relinquish in the last four games of the season. Identify this four word phrase which denoted the literal (and perhaps figurative) lateness of Hartnett's smash off of the Pirates' Mace Brown.
Homer in the Gloamin'