Well, I went to the ceremony according to the time listed on ecas. It listed 2:30 online do I went to you place at 2:20. There was a table set up outside the room with about three people sitting at it. I walked right by and no one asked me about anything. I sat anywhere I wanted and even switched seats. People came and went throughout the ceremony to use bathroom, take out a crying baby, etc. I left early myself. The doors were never shut or locked. The ceremony itself consisted of the judge speaking for 20 minutes on the history of Saskatchewan and what citizenship means. Then the whole audience was invited to take the oath as a group. After that each individual was called one by one to get certificate. There was a side table you went to but not sure what they were asking there but you only spent 20 seconds at it. The they sang oh Canada and could take photos. All about one hour in total from start time. It began right on time. I think you need to go when your letter states. It would be crazy not to have to register or show identification. Do, I think the ease time is for the public who want to attend but the time on your letter is for you to go early and register. If times on letters differ it is probably to stagger the registration so there is not a hundred person line up. That is how it was at tcu place in march.