"Thirty days hath September...." I wonder how many versions of that there are? I am sure I learned one of them in Spanish class years ago and again in Portuguese - both long forgotten. Perhaps someone can share different versions of this mnemonic or others. However, there are other ways to remember the long and the short months. Here is a trick I learned:

Hold your hand palm down and make a fist. Using the knuckles nearest the body of your hand and excluding your thumb, begin counting out the months at one or the other of the end knuckles. The first knuckle would be January, the indentation between that and the next knuckle would be February. The next knuckle is March...etc.. When you reach the last knuckle, July, jump back to the first knuckle and continue with August. The prominent ones would represent the months containing 31 days, the others would have less.