How to do we create a date value set in R12 that will show backend format in DD-MON-YYYY

Hi ,

How to do we create a date value set in R12 that will show backend format in DD-MON-YYYY?  At present, acceptable date value set in FND_STANDARD_DATE which shows backend date format diffferent from DD-MON-YYYY.  We have changed a field to FND_STANDARD_DATE in production and we can not change it back to FND_DATE4 which caused all reports referring to the field to ERROR status.  Please help.

Thanks,

Jennifer