Orthodox Calendar


Orthocal.info is an Eastern Orthodox calendar service providing a RESTful api describing commemorations, fasting, scripture readings and other information for each day of the liturgical year. Presently only the OCA is fully supported. There is tentative support for ROCOR, but fasting guidelines may not be 100% correct. With assistance, I may eventually provide support for other US jurisdictions.

This service is meant to be a tool for mobile developers and parish webmasters to use to provide this information to parishioners and other guests. The Source Code is freely available. The original version of this site was written in a combination of Go and Node.js, but has been rewritten in Python since the author finds that easier to maintain.

Contact the Author

Orthocal.info is being provided to the Orthodox community with no strings attached. However, it is helpful to me, the author of the work, to know who is using it and how. I will then be able to know how best to support your usage of the api and will be able to keep you informed about changes or maintenance work that needs to be done. Please contact me via the contact form on my blog, Parochianus, and let me know about your usage. Please report bugs using the Github issue tracker.


The algorithm and data used in this service are based on the algorithm and data developed by Paul Kachur's orthodox_calendar project. As such, the commemoration data is incomplete. The primary purpose of this service is to provide daily scripture readings for lay persons and not to be an authoritative guide to the feasts and fasts of the Church.


Because this is open-source and free, the service must use a translation of the Bible that is either public domain or has agreeable license terms. At this point I have chosen to stick with the King James Version. While not ideal, many clergy consider this to be one of the best options for Orthodox. Because the rubrics use Septuagint versification, a handful of the Old Testament readings may be incorrect.

Composite readings are taken from the translations of the Archimandrite Ephrem (Lash). His translations can be accessed at Anastasis.


The lives of the saints are taken by permission from Abba Moses.