Then the elderly would feel secure enough to sit in the open streets again, and children would again play in the streets because they would be safe. During the destruction of Jerusalem both of these groups of Israelites had suffered greatly ( Lamentations 2:21). In other words, Jerusalem would become a place of tranquillity, long life, peace, prosperity, and security for even the most defenseless of her citizens (cf. Isaiah 65:20-25). These conditions await the return of Jesus Christ at His second coming. [source][source][source]
"In one of the most amazing and challenging statements about measurement of the health of society, Zechariah suggests that we look at the place the old and the young have in that society." [1][source]