Also known as the Autumn Term, it is one of the three terms into which the academic year is traditionally divided, the other two being the Spring Term and the Summer Term. The Michaelmas Term runs from September or October to December. Its duration depends upon the institution in question, but is usually between eight and twelve weeks. It takes its name from the feast of St Michael the Archangel, traditionally known as Michaelmas Day, which falls on 29 September, thus marking (approximately) the beginning of term. It is the traditional name for the Autumn Term at the universities of Oxford and Cambridge (where the Spring Term is known as Hilary and the Summer Term as Trinity), and has subsequently been adopted by some other institutions.