From what I have seen in the past, it should be only a couple of weeks... the birds will quit divebombing once the babies are gone.... they are trying to protect their young.... I have a friend who has a bluejay that insist on nesting in a tree in her front yard... she goes thru this every year. Once the babies are out of the nest, every thing gets back to normal.
God is and all is well
~John Greenleaf Whittier~