code: function(year, includeWeekends) {
      initialize(year);
  
      includeWeekends = includeWeekends || false;
  
      var self = this;
      var holidays = [];
  
      if (!includeWeekends) {
        self.year.discardWeekends();
      }
  
      Object.keys(self.year.holidays).forEach(function(month) {
        self.year.holidays[month].forEach(function(holiday) {
          holidays.push(holiday);
        });
      });
  
      return holidays;
    }
docs: Returns holidays by year.
  @param {number} year
  @param {boolean} [includeWeekends] include holidays falling on a weekend (default: false)
  @return {Array}