Lockhead Martin F-35 Lightning II first flew on December 15th, 2006.
Day of Military Honour  Siege of Ismail (Russia)Independence Day (Libya)Mdraniht (Anglo-Saxon paganism)National Eggnog Day (United States)December 25Children's Day (Cameroon, Central African Republic, Chad, Equatorial Guinea, Democratic Republic of the Congo, Gabon, Republic of Congo)Christmas (Christianity)Constitution Day (Taiwan)Good Governance Day (India)Malkh-Festival (Nakh peoples of Chechnya and Ingushetia)Newtonmas (Atheist community)Quaid-e-Azam's Day (Pakistan)Takanakuy (Chumbivilcas Province, Peru)National Pumpkin Pie Day (United States)December 26Independence Day in Slovenia  Independence and Unity DayKwanzaa (December 26 to January 1) (African-American community, United States)Saint Stephen's DayWren Day (Ireland and the Isle of Man)December 27Independence and Unity Day (Slovenia)Mauro Hamza Day (Houston, Texas)Mummer's Day (Padstow, Cornwall)St
 Department of Defense/Air Force/Defense Acquisition University sponsored a research project conducted by the University of Tennessee, looking at the effectiveness of PBC frameworks in defence projects

