'Fast day' in the Bible

"Why have we fasted,' they ask, "but you do not see? "Why have we humbled ourselves,' they ask, "but you take no notice?'" "Look! On your fast day you serve your own interest and oppress all your workers.

therefore go thou, and read in the roll, which thou hast written from my mouth, the words of Jehovah in the ears of the people in Jehovah's house upon the fast-day; and also thou shalt read them in the ears of all Judah that come out of their cities.