In various scripts on these pages, including tip 0531 » How do I parse a date into month, day, and year and tip 0721 » General purpose date math routine, I parsed the date /t command into its' component month, day, and year.
If your date format is not mm/dd/yy, you had to modify these scripts to get them to work in your environment.
If a script could determine the date format for the environment it runs it, the script could be universal, working in any date format.
If you open a CMD prompt and type date and then press Enter, you can see that the second line of the output does contain a model of the date format. Borrowing a technique from tip 1986 » How can I get an accurate time in a batch job, we can use the echo.|date syntax to press the enter key for us.