What event are the speakers discussing?

W James, I just remembered something. Isn’t Mary Ellen’s wedding this weekend?
M Yeah, that’s right. It’s Saturday afternoon at 1:30, so we’ll need to get dressed and be there by 12:30 to get a good seat. Do you remember how to get to the St. Mary Hall?
W Well, I remember that it’s over on Green Street, near the hockey arena, but I’m not sure where. I better call and ask Elly May right away.