'Day' in the Bible

“Until the cool of the day when the shadows flee away,Turn, my beloved, and be like a gazelleOr a young stag on the mountains of Bether.”

“Go forth, O daughters of Zion,And gaze on King Solomon with the crownWith which his mother has crowned himOn the day of his wedding,And on the day of his gladness of heart.”

“Until the cool of the dayWhen the shadows flee away,I will go my way to the mountain of myrrhAnd to the hill of frankincense.

“We have a little sister,And she has no breasts;What shall we do for our sisterOn the day when she is spoken for?