Error text: date specification `__' contains an illegal month
Reference: RFC 2578 section 2
ExtUTCTime ::= OCTET STRING(SIZE(11 | 13))
-- format is YYMMDDHHMMZ or YYYYMMDDHHMMZ
-- where: YY - last two digits of year (only years
-- between 1900-1999)
-- YYYY - last four digits of the year (any year)
-- MM - month (01 through 12)
-- DD - day of month (01 through 31)
-- HH - hours (00 through 23)
-- MM - minutes (00 through 59)
-- Z - denotes GMT (the ASCII character Z)