ephemeral/lib/moment.holiday.js

Formatting dates with English prepositions & holiday names

//## Moment.JS Holiday Plugin
//
//Usage:
//  Call .holiday() from any moment object. If date is a US Federal Holiday, name of the holiday will be returned.
//  Otherwise, return nothing.
//
//  Example:
//    `moment('12/25/2013').holiday()` will return 'Christmas Day'
//
//Holidays:
//  You can configure holiday bellow. The 'M' stands for Month and represents fixed day holidays.
//  The 'W' stands for Week, and represents holidays with date based on week day rules.
//  Example: '10/2/1' Columbus Day (Second monday of october).
//
//License:
//  Copyright (c) 2013 [Jr. Hames](http://jrham.es) under [MIT License](http://opensource.org/licenses/MIT)
(function() {
  var moment = typeof require !== 'undefined' && require !== null ? require('moment') : this.moment;

  //Holiday definitions
  var _holidays = {
    'M': {//Month, Day
      '01/01': 'New Year\'s Day',
      '07/04': 'Independence Day',
      '10/31': 'Halloween',
      '11/11': 'Veteran\'s Day',
      '11/28': 'Thanksgiving Day',
      '11/29': 'the Day after Thanksgiving',
      '12/24': 'Christmas Eve',
      '12/25': 'Christmas Day',
      '12/31': 'New Year\'s Eve'
    },
    'W': {//Month, Week of Month, Day of Week
      '1/3/1': 'Martin Luther King Jr. Day',
      '2/3/1': 'Washington\'s Birthday',
      '5/5/1': 'Memorial Day',
      '9/1/1': 'Labor Day',
      '10/2/1': 'Columbus Day',
      '11/4/4': 'Thanksgiving Day'
    }
  };

  moment.fn.holiday = function() {
    var diff = 1+ (0 | (this._d.getDate() - 1) / 7), memorial = (this._d.getDay() === 1 && (this._d.getDate() + 7) > 30) ? '5' : null;

    return (_holidays.M[this.format('MM/DD')] || _holidays.W[this.format('M/'+ (memorial || diff) +'/d')]);
  };

  if ((typeof module !== 'undefined' && module !== null ? module.exports : void 0) != null) {
    module.exports = moment;
  }

}(this));