Calculate Liturgical Dates in Seconds with This Spreadsheet!

Calculating liturgical dates like Easter, Pentecost, and Advent by hand is frustrating and error‑prone. One wrong calculation can disrupt worship schedules, daily rosary apps, newsletters, and community events.

This spreadsheet solves the problem instantly. Just enter the year, and it generates accurate liturgical dates from 1900 to 9998. Built in Google Sheets, it’s cloud‑based, easy to copy, and requires no downloads. Hidden sheets handle the complex math, while the main sheet keeps everything simple and user‑friendly.

For developers, it even outputs JSON arrays via a read‑only API link, making integration into apps seamless.

I created this tool as a companion to the Daily Rosary API, an open‑source project launched during COVID. My goal is to empower anyone to build their own daily rosary app with personalized audio or video, making prayer more meaningful and connected.

You can enter $0 in the “Name a fair price” box to get it free, or contribute any amount to support the project.

Note: The Liturgical Calendar Spreadsheet is only compatible with Google Sheets at this time. You can create a free Google account and make a copy of the file directly within Google Sheets. There's no need to download anything, as it is entirely cloud-based

Features:

• Main Sheet: Accessible and user-friendly.
• Hidden Sheets: Additional data, neatly tucked away.

For Developers: Generate data in JSON array format through the provided read-only API link. Learn more.

Get your free copy now on Gumroad!

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FAQ

• How do I use it? Copy the spreadsheet to your Google account, enter the year, and the dates appear instantly.
• Do I need special software? No. It runs entirely in Google Sheets.
• Can I use this for my own rosary app? Yes. It’s designed to work with the Daily Rosary API, so you can build your own app with custom audio or video.
• What years does it cover? From 1900 to 9998, ensuring accuracy for centuries.
• Is it really free? Yes. You can enter $0 to download it. If you’d like to support the project, you can contribute any amount.
• Can I suggest improvements? Absolutely. Feedback is welcome to make this tool even more useful for the community.

Many Thanks for Your Generosity!