They are very unlikely to set any specific dates again, though they may drop hints from time to time.
Actually, they have made a big change recently with the May 1st watchtower questions from readers,( though I personally doubt that any "reader" other than a gb member would dare ask a doctrinal question anyway), in that they have abandoned the date for the final gathering of the anointed
They have long taught that, apart from replacements for those who fell away, that this took place in 1935. Now they say that this gathering is still taking place, which covers them when anyone questions why the number of memorial partakers goes up rather than down, but don't say when it will be completed. With this "new light" they are able to postpone armageddon again, as they teach that the anointed have to be sealed by the time the end comes. I would think that many jws are as yet unaware of this new teaching, as the QFR articles aren't read by everyone, but I wouldn't be surprised if they publish a watchtower study article on it, referring to the May 1st QFR, sometime this year, maybe just before the annual report is published in the watchtower.