They hold special ceremonies to celebrate Canada day, and usually invite a larger number of citizenship candidates.
This link on IRCC website says last year there were 55 ceremonies across the country of which 28 were in Ontario. They were all over Toronto and surrounding areas (there were ceremonies in Downtown, East York, North York, Scarborough and Etobicoke as well as other parts of the GTA).
Lets hope everyone with DM doesn't have to wait past July 1st 2018! Given that they typically issue Oath invites 3-4 weeks before the actual ceremony, the wait should really end by 11-Jun-2018
, that's 6 weeks away...not too bad eh?