I wish I had an answer here... it used to be April since the MCAT was only offered twice a year. Of course, there were folks that took the August MCAT in their senior year and still applied and got in for the fall after graduation. However, wasn't there a rumor about offering the MCAT 20 times a year or so? In that case, you could take it the last day of your junior year and still have time to apply.