On January 13, 1984, President Ronald Reagan issued a proclamation designating January 22 as the first National Sanctity of Human Life Day. (January 22, 1973, was the day the U.S. Supreme Court legalized abortion-on-demand in all 50 states.) Churches around the United States use the day to celebrate God's gift of life, commemorate the many lives lost to abortion, and commit themselves to protecting human life at every stage.
Churches continue to recognize the third Sunday in January as Sanctity of Human Life Sunday. In 2021, that date will be January 17, however some churches will be marking it on the 24th because it's closer to the anniversary. Either way is fine.
Each year, Life Matters Worldwide prepares resources for churches to use in their commemoration -- bulletin inserts, sermon outlines, slideshows, and more. Our materials are undated, so they can be used any time.