date format in ksh

[Suhen Pather]

List,   Sorry to deviate from the topic, but I am writing a korn shell script that would exit if the date format is incorrect.   I just need something to compare the date format passed  in with DD-MON-YYYY.   Eg. I am passing an argument to my ksh script being the date. If the date is in any other format but DD-MON-YYYY the ksh must exit.   Eg.  sh test.ksh 02/05/1999   It must exit.   The only format excepted should be sh test.ksh 02-MON-YYYY   TIA   Regards Suhen