Base Library hours cut Published June 25, 2014 71st Flying Training Wing Public Affairs VANCE AIR FORCE BASE, Okla. -- The Vance Library's hours have changed due to new Air Education Training and Command instructions. The library is now open Monday through Thursday, 11 a.m. to 6:30 p.m.; Friday and Saturday, noon to 5 p.m.; and closed Sunday. The Vance Library falls under the "small" category outlined in Air Force Instruction 34-270, "Air Force Library and Information System." The AFI dictates that libraries that falls under the small category are limited to 40 hours a week.