I've been given an oath ceremony for August 30, but I have yet to receive the actual invitation, so I called IRCC this morning to let them know and to see how much longer it would take to get since the ceremony is only a week away. After calling several times, I finally spoke to someone. She said that you usually get a notice and then the actual ceremony invitation in your email. She did say that it typically gets sent out 2 weeks in advance, so there may be a delay in my ceremony since I have yet to receive any notification and it's a week and 1 day away. She put a request into my case officer/office where my application is at letting them know I haven't received the invitation yet. She did also mention that if I don't receive the invitation by Aug 30 since that is when I am scheduled for my ceremony then they will reschedule me for the next soonest one since it's not my fault for missing it since I never received the invite to it. She said it was good I called so there is a notation that I haven't gotten the invite and it wasn't my fault for missing should I never get the invite in time for the Aug 30 ceremony I am scheduled for. She was really nice and helped as much as she could. Not sure if anyone else has had this issue yet. My application is at the Montreal office btw.