when a put the command:
address@hidden controles]$ date
vie oct 31 13:41:49 ART 2003
address@hidden controles]$ date -d "1 month ago"
mié oct 1 13:42:04 ART 2003
The re is a big mistake. If today is 31/10/2003 , 1 Month Ago must return or 30/09 or someting else, but not "OCT 1"