August 25th.
In those days, and in that time, saith the Lord, the iniquity of Israel shall be sought for, and there shall be none; and the sins of Judah, and they shall not be found: for I will pardon them whom I reserve. (Jeremiah 50:20 KJV)
Those days - The days of the Messiah.
Reserve - Or, permit to remain: hence, the remnant, a word pregnant with meaning in the language of the prophets. (Albert Barnes)