The Iffley Dinner is held annually for all members of college, common room and their guests to commemorate the founding of the college.
In 1965, the University founded Iffley College in order to provide for members of its academic staff who held no College fellowship. Iffley College came into existence in September 1965 with 36 Fellows. Sir Isaiah Berlin agreed to become the first President if he could raise the funds needed to build a home for the College and put it on a secure financial footing. In 1966 generous benefactions were received from the Wolfson and Ford Foundations which enabled the College, renamed Wolfson, to make provision for graduate students. The College had no buildings of its own until 1968 when the doors to 60 Banbury Road were opened to the first graduate students, 25 in number. The main College buildings were ready for occupation in 1974 and the College received its Royal Charter in 1981.