Forty years after their brutal murders on Dec. 2, 1980, the lives and tragic deaths of four American churchwomen murdered in El Salvador will be commemorated in a number of prayer services, vigils, and online events.

“Walking in the footsteps of these courageous women continues to be an experience of transformation and a call to do and be more,” said Sr. Joanne Gallagher, a member of the Sisters of St. Joseph of Boston, who serves as the congregation’s communications director.

Gallagher, who visited El Salvador in 2015 for the 35th anniversary commemorations, calls Dec. 2 a “holy day” for her and other American sisters and often ponders the question of what would the four women “say to us today? More to the point, what are they saying to us today?”

Read the full story at Global Sisters Report.