I agree; Q has actually not given any concrete predictions of dates, unless you count a reference to “10/30 @ 12:01” regarding HRC being extradited in the very first post - and even then, “10/30” could be code for something else other than a date, or it could be intentional disinformation to throw off the bad actors who would also be looking at the Q posts.

Also, as far as I know Q did not make any guarantees about Trump being sworn in for a second term. If Q is to be believed, he was merely a part of a larger operation to take out corrupt elements embedded within the government for too long.