LMSA, it fascinated me once to have a look at what actually happened at the Conventions they claimed were the fulfilment of a great Bible prophecy.
One I looked at, which had obviously been chosen because it was roughly the required number of days before another such Convention, which did have a Proclamation if memory serves, but the first one, NOTHING ! There was a reference to it later in a Magazine, that claimed something about it, like a Talk that was given there being significant, but that was on the wrong day ! if you counted the 1235 or 1260 days or whatever it was, they did not compute.
I guess they rely upon no JW actually analysing their claims to that obsessive degree, I don't know now why I spent so much time debunking the claims back then, it is all so obviously totally contrived nonsense.