Traditionally, Petrean Dinners have been held the last week in September, to coincide with the Cambridge University Alumni Weekend. As this is always so close to the start of term and the return to residence of undergradautes, dinners are now held one week earlier.
Dates for future years are as follows:
- Saturday 23 September - matric. 1971-1975
- Saturday 22 September - matric. 1986-1990
- Saturday 21 September - matric. 1996-2000
- Saturday 19 September - matric. 2006-2010