batch program expire

hello everone!

I need help to develop a routine bat. I have a program that accesses FTP with many functions and have to send it to other friends. I wish he ran for four days and then stop working. I looked over 20 pages of the forum and no found something similar. The problem is I have no way of knowing if the date format is mmddyyyy or ddmmyyyy or yyyymmdd or language the OS the other computer.

Any ideas?

Thanks for the help.
Luis