Windows NT SP6a
In my batch file, I have the following lines:

for /f "Tokens=2-4 Delims=/ " %%a in ('date /t') do set mm=%%a & set dd=%%b & set yy=%%c
MD C:\%yy%\%mm%\%dd%
RENAME ABC.DOC A%yy%%mm%%dd%%.DOC

I was able to tokenize the date into year, month, and day. Also I was able to create folder of C:\2005\06\09. However, I could not rename ABC.DOC to A20050609.DOC. Also I could not create a file with more than 8 characters under a batch file. Please help.

About the Rename's problem, replace

RENAME ABC.DOC A%yy%%mm%%dd%%.DOC

with

RENAME ABC.DOC A%yy%%mm%%dd%.DOC

there is a % before .DOC in excess and that can mess up the command.

About the filename's question, I do not understand the problem as it is perfectly allowed to create long file names in NT batch scripts. Are you sure you used correct file name notation (see the first question)?

I removed the extra % and tried again. It didn't work. Do you have other ideas in creating a folder/file based on system date?

I also like to use xcopy in the following command.

XCOPY A%yy%mm%dd%.DOC C:\%yy%\%mm%\%dd%

Stated that your first post about Rename had an extra %, which message do you get from the not working Rename?

Is the ABC.DOC in your current directory?

About the XCopy command, you can use it in your script typing it correctly, i.e.

XCOPY A%yy%%mm%%dd%.DOC C:\%yy%\%mm%\%dd%

this time you miss % embedding mm (precision is the root of programming!), but why do you use XCopy to copy just one file?

And more, do you realize that C:\%yy%\%mm%\%dd% is actually a tree structure NOT a single folder (as C:\%yy%-%mm%-dd% is instead)?