Martin Luther King Jr Coloring Pages can help your kids learn more about MLK and celebrate his life and the holiday. MLK day is celebrated every 3rd Monday in January in the United States. It is a national holiday, but even though you have the day off, there are still many ways you can follow in Martin Luther King Jr’s footsteps and serve. Do something special for your community, your friends and your loved ones. One way to get in the spirit is with coloring pages and activity worksheets.