'Day' in the Bible

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

“I had taken off my dress,How can I put it on again?I had washed my feet,How could I get them dirty again?

“I went down to the orchard of nut treesTo see the flowers of the valley,To see whether the grapevine had buddedAnd the pomegranates were in flower.

(The Chorus)“We have a little sisterAnd she has no breasts.What shall we do for our sisterOn the day when she is spoken for [in marriage]?