'Acceptable' in the Bible

Is such the fast that I have chosen, a day for a man to afflict his soul, that he should bow down his head as a bulrush, and spread sackcloth and ashes under him? Wilt thou call this a fast, and a day acceptable to Jehovah?

to proclaim the acceptable year of Jehovah, and the day of vengeance of our God; to comfort all that mourn;