I just checked MLB.com and there is no evening game scheduled for that day. They're probably going to wait and see what game would be a good one, then change the time for that game.
The Yankees play Cleveland at home on Tuesday night (Aug 31) of convention week in NYC
The Yankees are probably maxed out as far as the number of ESPN Sunday night baseball games this year.
There are a finite number of games that they are allowed to show on ESPN for each team. I'd be willing to bet that they won't be showing that game. They usually reserve the Yankee games for like Yankees-Mets, Yankees-Red Sox, Yankees-Dodgers (this year), etc.