encaenia
noun
en·cae·nia en-ˈsē-nyə 
plural in form but singular or plural in construction
often capitalized
: an annual university ceremony (as at Oxford) of commemoration with recital of poems and essays and conferring of degrees
Word History
Etymology
New Latin, from Latin, dedication festival, from Greek enkainia, from en + kainos new — more at recent
First Known Use
1691, in the meaning defined above