The five museums of the state of Delaware — the John Dickinson Plantation, the Johnson Victrola Museum, the New Castle Court House Museum, The Old State House and the Zwaanendael Museum — will be closed Dec. 24, 25 and 31; Jan. 1, 2018.

The Air Mobility Command Museum on Dover Air Force Base will be closed Dec. 24-26 and Dec. 31 through Jan. 2, 2018.