easter-date.js

Easter Date Calculation

This project provides two algorithms for calculating the date of Easter in the Western (Catholic and Protestant) and Orthodox calendars.

Based on Gauss's Easter algorithm: https://doi.org/10.1007/s00407-004-0078-5

Installing

Install with npm

  npm install easter-date.js

or yarn:

  yarn add easter-date.js

Usage/Examples

To use the algorithms, import them into your JavaScript code:

// ES Modules
import { getWesternEaster, getOrthodoxEaster } from "easter-date.js";

// CommonJS
const { getWesternEaster, getOrthodoxEaster } = require('easter-date.js');

and pass the desired year as an argument:

getWesternEaster(2024); 
// Output: { day: 31, month: 3, year: 2024 }

getOrthodoxEaster(2024); 
// Output: { day: 5, month: 5, year: 2024 }

Run Locally

Clone the project

  git clone https://github.com/42proger/easter-date.js

Go to the project directory

  cd easter-date.js

Install dependencies

  npm install

Run a compile

  npm run build

Running Tests

To run the tests, install the required dependencies and run the following command:

  npm run test

License

MIT