# File actionview/lib/action_view/helpers/date_helper.rb, line 816
def select_month
  if @options[:use_hidden] || @options[:discard_month]
    build_hidden(:month, month || 1)
  else
    month_options = []
    1.upto(12) do |month_number|
      options = { value: month_number }
      options[:selected] = "selected" if month == month_number
      month_options << content_tag("option".freeze, month_name(month_number), options) + "\n"
    end
    build_select(:month, month_options.join)
  end
end

# File actionview/lib/action_view/helpers/date_helper.rb, line 830
def select_year
  if !@datetime || @datetime == 0
    val = "1"
    middle_year = Date.today.year
  else
    val = middle_year = year
  end

  if @options[:use_hidden] || @options[:discard_year]
    build_hidden(:year, val)
  else
    options                     = {}
    options[:start]             = @options[:start_year] || middle_year - 5
    options[:end]               = @options[:end_year] || middle_year + 5
    options[:step]              = options[:start] < options[:end] ? 1 : -1
    options[:leading_zeros]     = false
    options[:max_years_allowed] = @options[:max_years_allowed] || 1000

    if (options[:end] - options[:start]).abs > options[:max_years_allowed]
      raise ArgumentError, "There are too many years options to be built. Are you sure you haven't mistyped something? You can provide the :max_years_allowed parameter."
    end

    build_options_and_select(:year, val, options)
  end
end