Blow the trumpet in Zion and sound the alarm. The 9th of Av is a special day on God's calendar. It's part of the appointed times of the Fall Feasts. Many things have happened historically on this date.
At that time God will thresh from the River Euphrates to the Brook of Egypt, and you,
people of Israel, will be selected grain by grain. At that same time a great trumpet will be blown, calling home the exiles from Assyria, Welcoming home the refugees from Egypt to come and worship God on the holy mountain, Jerusalem. Isaiah 27:12-13 The Message Bible
