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Liturgical Calendar API

Incubating
API

A comprehensive API for the liturgical calendar of the Roman Rite, providing data for feast days, liturgical seasons, and more.

Project Leads

profile photo John D'Orazio

Fr. John R. D’Orazio

Vice Chair and Lead Developer

Catholic priest incardinated in the Diocese of Rome, stationed in the Diocesan Pilgrimage Office. Fr. John is passionate about harnessing technology in service of the Church’s evangelizing mission, in a community-driven and synodal fashion. He has contributed to numerous open source projects, is the author of a Liturgical Calendar API and a Bible API, and has helped foster the growth of Open Source Catholic, a growing community of Catholic developers dedicated to building open source technology for the Church.

Mike Kasberg

Mike Kasberg

Staff Software Engineer

Brings extensive expertise in performance, scalability, and systems architecture at Strava, working across a wide range of technologies including Linux, Ruby, Scala, and Java. Mike is a dedicated contributor to the Open Source Catholic community and the creator of ConfessIt, a Roman Catholic examination of conscience app for computers, tablets, and phones that he first released in 2012. A committed Catholic and open source advocate, he actively supports Catholic organizations through technology and shares his insights on software development through his blog.

Matthew Ayers profile photo

Matthew Ayers

Software Engineer, NetJets

Matthew Ayers is a software engineer at NetJets Services, Inc. He holds a Bachelor of Science in Computer Science and Engineering from The Ohio State University. His technical expertise spans Linux/UNIX systems, cloud technologies, web platforms, Swift, and Python. A former software engineering intern at JPMorgan Chase, FOCUS (Fellowship of Catholic University Students) missionary, and founding software engineer at Truthly, he actively contributes to open-source projects for the Catholic community.