HILARY TERM

from The Collaborative International Dictionary of English v.0.48

Hilary term \Hil"a*ry term`\
   Formerly, one of the four terms of the courts of common law
   in England, beginning on the eleventh of January and ending
   on the thirty-first of the same month, in each year; -- so
   called from the festival of St. Hilary, January 13th.
   [1913 Webster]

   Note: The Hilary term is superseded by the Hilary sittings,
         which commence on the eleventh of January and end on
         the Wednesday before Easter. --Mozley & W.
         [1913 Webster]

from Bouvier's Law Dictionary, Revised 6th Ed (1856)

HILARY TERM, Eng. law. One of the four terms of the courts, beginning the 
11th and ending the 31st day of January in each year.