# File lib/innodb/data_type.rb, line 277
    def value(data)
      date = BinData::Int24be.read(data) ^ (-1 << 23)
      day = date & 0x1f
      month = (date >> 5) & 0xf
      year = date >> 9
      "%04d-%02d-%02d" % [year, month, day]
    end