ТЕМНАЯ НОЧЬ НЕ НАВЕК

Cf:The darker hour is that before the dawn (Br.). The darkest hour is just before dawn (Am.). The darkest hour is nearest the dawn (Am.,Br.). It is always darkest before /the/ dawn (Am.,Br.). It's always dark before the sun shines (Am.). The longest night must end (Am.). The longest night will have an end (Br.)