YYMMDD

AcronymDefinition
YYMMDD(2-Digit) Year, Month, and Day
References in periodicals archive ?
It doesn't really matter if you input the date as 4-11-91 because internally, it's still stored YYMMDD.
YYMMDD HHMMSS <command> ;<comment>' where, <comment> is a string of characters not exceeding the current line length, YYMMDD is a valid future date, HH ranges from 00 to 23, MM ranges from 00 to 59, and SS ranges from 00 to 59.
Let's face it: Changing YYMMDD into YYYYMMDD is not Nobel Prize stuff, it's intellectually trivial.