The Tzemach Tzedek (Rabbi Menachem Mendel, the third Rebbe of Chabad) once spoke about the imminent coming of Moshiach on a day of which it is said that Moshiach cannot come.
Someone asked him, "what is the meaning of this? It has been stated that at such a time he cannot come."
The Tzemach Tzedek replied, "just let him come. Once he comes there will be answers for all problems, and this problem also will then be solved!"
Moshiach Now! & From our Sages reprinted from LchaimWeekly.org – LYO / NYC