Investors and analysts widely recognized that the U.S. automotive industry was going to have a tough May, at least as far as year-over-year sales comparisons were concerned. That’s because last month had two fewer selling days and one less weekend on the calendar, giving last year’s May a significant advantage for selling vehicles. Because of that, the industry logged its steepest monthly sales drop in six years, and some of the declines, such as Toyota‘s and General Motors‘ (NYSE: GM) respective 9.6% and 18% drop, were huge.