Pregabalin Approvals Hit the Approval Trail, but Why So Late?

According to the FDA, OGD approved 11 ANDAs for Pregabalin (a generic for Lyrica), on Friday, July 19, 2019.  However, when looking at the Innovator product’s patent and exclusivity awards, the 180-day pediatric exclusivity expired on June 30, 2019.  This got my mind working to try to figure out why the
17-day (June 30 fell on a Sunday) delay occurred,