As if he has been on time before.
Via WaPo:
President Obama’s address to the nation on Sunday night will force him to be late to the the 38th annual Kennedy Center Honors performance celebrating the achievement of five artists.
The president attended a White House reception at 5 p.m. for Honorees Carole King, George Lucas, Seiji Ozawa, Cicely Tyson and Rita Moreno. After his 8 p.m. address, he is expected to go to the arts center for the remainder of the show. First Lady Michelle Obama will attend the Honors performance as planned. The show will be broadcast on CBS on Dec. 29.

