In that day that he shall suffer death the sun shall be darkened and refuse to give his light unto you; and also the moon and the stars; and there shall be no light upon the face of this land, even from the time that he shall suffer death, for the space of three days. Helaman 14:20
Darkness should cover the face of the whole earth for the space of three days. Helaman 14:27
It came to pass that it did last for the space of three days that there was no light seen. 3 Nephi 8:23