We won't know the day or hour, but we will know the season. When these things begin to happen, look up ...
But (my Biblical knowledge fails me here), wasn't there one reference to the Second Coming at "twilight?" So that would mean we would know the "hour". In fact, it is interesting, if you want to be a literalist, that Jesus used the term "no man KNOWS the hour or the day," but did not say "no man will ever know the hour or the day." Just a point of interest.