Martin Luther King Jr., a reverend and civil-rights activist, was assassinated at 39. However, he inspired several movements and political changes.

Martin Luther King Jr. Day is observed in the U.S. on the third Monday of January to honor the life and legacy of the civil rights leader. This year, the federal holiday coincides with the inauguration of President-elect Donald Trump,

The 42nd edition of a local MLK Day march is expected to draw an even greater turnout than usual this year, while many other events will mark the holiday in unique ways.