From an email:
“The Smithsonian will host a two-day holiday festival, Saturday, December 6, and Sunday, December 7, at the National Air and Space Museum, National Museum of Natural History, National Museum of American History and Smithsonian Castle. The festival will include concerts by the U.S. Air Force’s Max Impact, Silver Wings, and Celtic Aire, seasonal films (including The Muppet Christmas Carol), Mars Chocolate demonstrations, family holiday photo opportunities, trunk shows featuring apparel, jewelry and art, book signings, festive food and hours of additional family-friendly entertainment.
There will also be gift-wrapping at the National Air and Space Museum, National Museum of American History and National Museum of Natural History. The Smithsonian Holiday Shuttle will loop the National Mall every 10 minutes, transporting festival-goers to the holiday festival locations. For full details, visit the event webpage.”