Celebrating the Legacy of Dr. Martin Luther King, Jr.

To see more from Instagrammers celebrating Martin Luther King, Jr. Day and volunteering across the United States, browse the #dayofservice, #MLK and #martinlutherkingday hashtags. For more photos and videos from landmarks remembering MLK, explore the Martin Luther King, Jr. Memorial and Dr. Martin Luther King, Jr. National Historic Site location pages.

On Monday, citizens across the United States celebrate the memory and achievements of Dr. Martin Luther King, Jr., a key leader in the African-American Civil Rights Movement throughout the 1950s and 60s. King fought against racial segregation in the United States and encouraged the practice of non-violent protest and free speech as means to change. King was an instrumental organizer of the 1963 March on Washington where he delivered his famous "I Have a Dream" speech to an audience of nearly 300,000 people.

Martin Luther King, Jr. Day was officially established as a US federal holiday in 1986. It is celebrated on the third Monday of January, which falls around the time of King’s birthday on January 15. Many now take this holiday as a day of service, dedicating time to work with volunteer organizations throughout the country.

Looking for inspiration for how you can make a difference? Check out the good deeds done by Instagrammers around the world over the past weekend for #WHPhelpinghand.