And God told Abraham that it would be 400 years that Israel would be in Egypt when it was actually 480 years....
When Christ said he comes as a thief and only the Father in Heaven knows the time of the “end” or “his coming”...depends on what we are defining...he meant exactly that...no one would know...no on earth would be able to “figure it out”. Christ’s death and resurrection signaled a new covenant with men, one in which God would write his laws in our inward places. It also means that old forms and customs would also find their living expression in our lives as well. As for his coming....it could be “Trumpets” as you mention or it could be some ordinary day in June...a woman somewhere grinding corn with her friend...just doing ordinary stuff...and poof she’s gone....or another fellow walking with a friend...perhaps he is trying to win his friend to Christ...then poof...he’s gone. Christ said we weren’t to know because “certain vested interests” would act to guard against it...Matthew 24:”…42Therefore keep watch, because you do not know the day on which your Lord will come. 43But understand this: If the owner of the house had known in which watch of the night the thief was coming, he would have kept watch and would not have let his house be broken into. 44For this reason, you also must be ready, because the Son of Man will come at an hour when you do not expect Him.…”
You expect him to come during Trumpets over a “two day” so naturally he won’t come on those days.(or he might because...”no one knows for sure”) The verse is an exhortation to be spiritually ready and pure in heart so that one isn’t caught in a “slumbering state” where one is only saved by the “skin of his teeth”!