Base holiday closures and hours of operation Published Dec. 15, 2009 20th Fighter Wing Public Affairs SHAW AIR FORCE BASE, S.C. -- The following are the holiday hours of operation throughout Shaw. 20th Medical Group: The 20th Medical Group will be closed Dec. 25 in observance of the Christmas Holiday, Dec. 28 for the Air Combat Command Family Day and Jan. 1 in observance of New Year's Day. Please call 911 if you have a Medical Emergency. 20th Dental Clinic: The Dental Clinic will be closed Dec.18 at noon. Shaw Commissary: The commissary will be open: Tuesday - Friday from 10 a.m. - 7 p.m. Saturday from 10 a.m. - 6 p.m. Sunday from 11 a.m. - 5 p.m. Closed on Mondays, Dec. 25 and Jan. 1 The commissary will also close early on Dec. 24 at 3 p.m. Shaw Base Exchange: The BX is closed Dec. 25 and Jan. 1. The BX will close early on Dec. 24 and Dec. 31 at 5 p.m.