Book your hotel and flight. Washington D.C. is going to be the place to be this fall. And September 24 is the big day for the historic opening of the Smithsonian's National Museum of African American History and Culture.

As the day for the official grand opening was announced this morning, Twitter fans were instructed to #SaveTheDate with no less than seven months to go. The formal announcement said that President Barack Obama will cut the ribbon to open the doors to the public and commence a week-long celebration.

"After 13 years of hard work and dedication on the part of so many, I am thrilled," said the founding director Lonnie Bunch in a report. "In a few short months visitors will walk through the doors of the museum and see that it is a place for all people. We are prepared to offer exhibitions and programs to unite and capture the attention of millions of people worldwide. It will be a place where everyone can explore the story of America through the lens of the African-American experience."