Du script artisanal à l’infrastructure ouverte : genèse, enjeux et fondements de calendario _ liturgico

The annotation of liturgical dates in early modern archival sources is a central methodological challenge for XML-TEI digital editions. The Python library calendario_liturgico automates the computation of Christian liturgical dates from the sixth century to the present by combining the Gauss–Meeus algorithm for the Gregorian calendar with pre-calculated paschal tables for the Julian period (532–1582). This article situates the genesis of this tool within the scholarly context of editing inquisitorial trial records, analyses its mathematical and computational foundations, and assesses its validation protocols. It finally discusses how the transition from an ad hoc script to a shared software infrastructure reshapes scientific reproducibility, the interoperability of historical data, and the relationship between humanities scholarship and computation.