It was on this day in 1963 that Martin Luther King, Jr. gave his famous “I Have a Dream” speech, calling for an end to racism. That makes today the 50th anniversary.

Google is celebrating the occasion with a doodle on its homepage (pictured above).

This certainly isn’t the first time Google has honored Dr. King. The search engine has been regularly offering doodles on Martin Luther King, Jr. Day. Here are those from the last two years:

2013

2012

The year before that, Google celebrated the day with its employees engaging in community service.

On Tuesday, Google put up a blog post about a new online experience called “March on Washington” developed by Organic and Unit9 for the National Park Foundation. The experience lets users listen to the recording of Dr. King’s speech, while looking at photography from the event.

“One of the most powerful abilities of the web is that it connects people from all over the world in new ways,” wrote Associate Product Manager Max Heinritz. “In ‘March on Washington,’ you can also virtually join this historic event by recording yourself reciting Dr. King’s words. Then, you can play back other participants’ recordings as a crowd-sourced narrative of voices, hearing the timeless message repeated back from people all over the world.”

Image of King: Wikimedia Commons, All other images via Google