# File lib/tzinfo/tzdataparser.rb, line 114
    def self.parse_month(month)
      lower = month.downcase
      if lower =~ /^jan/
        @month = 1
      elsif lower =~ /^feb/
        @month = 2
      elsif lower =~ /^mar/
        @month = 3
      elsif lower =~ /^apr/
        @month = 4
      elsif lower =~ /^may/
        @month = 5
      elsif lower =~ /^jun/
        @month = 6
      elsif lower =~ /^jul/
        @month = 7
      elsif lower =~ /^aug/
        @month = 8
      elsif lower =~ /^sep/
        @month = 9
      elsif lower =~ /^oct/
        @month = 10
      elsif lower =~ /^nov/
        @month = 11
      elsif lower =~ /^dec/
        @month = 12
      else
        raise "Invalid month: #{month}"
      end
    end