The Active History team that produced the Royal Proclamation series this week is hosting a discussion on the same theme at York University on Monday, the anniversary date.
That's at 305 York Lanes --the York central concourse and shopping area -- 3:00 to 5:00 pm, with Victoria Freeman, Tom Peace (by skype at least), Keith Jamieson, Colin Coates, and me.
Update, October 7: Not in Hogtown: Charlevoix has a roundup of other RP250 events.