Michaelmas term

Short definition from Wiktionary

Noun

1. 1
   The first term of the legal year, running from October to December, during which the upper courts of England and Wales, and Ireland, sit to hear cases.
2. 2
   The first academic term of the universities of Oxford, Cambridge, and Dublin, and other educational institutions, running from October to December; the term was modelled after the legal term, but does not begin and end on the same dates.