convocation
US /ˌkɑːn.vəˈkeɪ.ʃən/
UK /ˌkɑːn.vəˈkeɪ.ʃən/

1.
a large formal meeting, especially of a university or college, at which degrees are given out
:
•
The annual convocation ceremony was held in the main auditorium.
•
Students gathered for the fall convocation to receive their diplomas.