Donald Trump will celebrate his Inauguration Day today, the same day as MLK Day. How many times have the two days overlapped? Here's what to know.

It was first proposed four days after King's 1968 assassination outside a Memphis motel. It took 15 years until it became a federal holiday.

The dual celebrations of a second Trump inauguration and the civil rights leader’s birth raise profound questions about Black leadership and progress toward the Rev. Dr. Martin Luther King Jr.’s dream.