date-easter

Calculates Easter for a given year

Synopsis

// ES5
import {easter, gregorianEaster, julianEaster, orthodoxEaster} from 'date-easter'
// cjs
const {easter, gregorianEaster, julianEaster, orthodoxEaster} = require('date-easter')

easter(2016)
// { year: 2016, month: 3, day: 27 }
gregorianEaster(new Date('2016-01-01'))
// { year: 2016, month: 3, day: 27 }
julianEaster(2016)
// { year: 2016, month: 4, day: 18 }
orthodoxEaster(2016)
// { year: 2016, month: 5, day: 1 }

Description

All methods return an object with the following properties

• year: Year (begins at 0)
• month: Month (1 ... 12)
• day: Day (1 ... 31)
• toString(): Returns a formatted String YYYY-MM-DD

easter

Shortcut for gregorianEaster.

gregorianEaster

Returns the date of Gregorian Easter for a given year. Uses the extended Gaussian Easter algorithm.

julianEaster

Returns the date of Julian Easter for a given year in the Julian Calender

orthodoxEaster

Returns the date of Julian Easter for a given year in the Gregorian Calender

References

• Date::Easter Perl Package https://metacpan.org/pod/Date::Easter Rich Bowen [e-mail]
• http://www.chariot.net.au/~gmarts/eastcalc.htm
• Gaussian Easter algorithm

License

Copyright (c) 2015 commenthol

Software is released under MIT.