gistfile1.rb

class Person
  def has_holiday_in?(year, month)
    calendar = new Calendar(year, month)
    calendar.has_holiday? ? true : false
  end
end

class Person
  def has_holiday_in?(calendar)
    calendar.has_holiday? ? true : false
  end
end

class Person
  def initialize(calendar)
    @calendar = calendar
  end

  def has_holiday?
    @calendar.has_holiday? ? true : false
  end
end