In May 2019, the World Health Organization established the “World Chagas Disease Day”, to be celebrated on the 14th of April. But why choose this date? Those who are familiar with the history of Chagas disease know that this was the day that Carlos Ribeiro Justiniano Chagas first identified the Trypanosoma cruzi infection in a human being, namely the two-year-old girl Berenice Soares de Moura [1–3]. Ironically, despite going down in history as the first described case of the new trypanosomiasis, discovered in the hinterlands of Brazil in 1909, she would live for many decades without developing any symptoms of the disease, passing away at 72 years of age due to neurological causes unrelated to Chagas disease. The landmark discovery, which now frames the “World Chagas Disease Day”, has a significance that goes beyond chronology. Like any memory rite, it recovers and monumentalizes the past from the horizons and perspectives of the present, as well as the future that one wants to project. What, then, is this significance? Why “celebrate” (in the sense of “remembering together”) April 14th?