1911 Encyclopædia Britannica, Volume 27… (1911)
“ According to Gervase of Canterbury, it had been introduced into England by Thomas Becket, archbishop of Canterbury, in 1162. It has, however, never been reckoned among the great festivals of the Church. From Trinity Sunday onwards all Sundays until the close of the ecclesiastical year are reckoned as “after Trinity.” In the Roman Church these Sundays are also reckoned as “after Pentecost.” ”
