February. Have you taken the SAT or ACT? These two tests are different and some students like one more than the other. Additionally, some students scores are higher on the one than the other. So try both! While you should check the testing requirements of schools you are interested in–very few schools do not accept scores from either test. Additionally, schools want your best scores so send the scores that show you in the best light. Remember neither test is viewed as the better one to take or a more rigorous option. Take the test that is the better fit for you and remember you will not know which is the better one for you unless you try both.