The Day of the Unborn Child is observed globally on March 25th as a day to honor, advocate for, and protect human life from conception to natural death.

Established in Argentina in December 1998 by President Carlos Saúl Menem, the observance quickly gained international support. In 1999, St. John Paul II sent a letter of encouragement, hoping the day would “foster a positive choice in favor of life and the development of a culture oriented in this direction.”

The initiative spread across Latin America, with Guatemala, Costa Rica (1999), Nicaragua (2000), Bolivia (2000), the Dominican Republic (2001), Peru (2002), and Paraguay (2003) adopting it by law. The celebration also takes place on March 25 in nations including El Salvador, Uruguay, Spain, Mexico, Austria, Slovakia, Cuba, the Philippines, Ecuador (2006), Chile (2014), and Puerto Rico (2018).

The date intentionally coincides with the Catholic solemnity of the Annunciation, commemorating the Virgin Mary’s ‘yes’ to God and the conception of Jesus. Catholic bishops worldwide often mark the day with events defending the unborn, and memorials have been erected for victims of abortion.