Wall Street JournalMcDonald's Set to Offer All-Day BreakfastWall Street JournalMcDonald's Corp. MCD -1.65 % is embarking on its biggest operational change in years as it tries to juice flagging sales, with plans to offer breakfast items all-day at its more than 14,300 U.S. restaurants starting Oct. 6. The move to all-day ...McDonald's Planning to Start Selling All-Day Breakfast on Oct.