noun
oration
aw-RAY-shun/ɔːˈreɪʃn/
A formal public speech, especially at a ceremony.
The mayor delivers a solemn oration at the annual memorial ceremony.

Etymology
The pieces name an act of speaking, pleading, or praying. English oration first meant a prayer, then developed the sense of an eloquent or weighty formal address.
In context
…grand honour to be asked to deliver this year's Supreme Court Oration…
I would imagine the oration that I would give on the beach if I finally did make it to the other shore.
More examples
- Her graduation oration celebrates the achievements of the entire class.
- He rehearses his oration before the dedication ceremony.
- The collection includes orations delivered at presidential inaugurations.