A good method is to 'hard code' your own DATE Setting. This way you can control the date to the future (or past?!) date of your choosing.
1. Go to Book Settings
2. Click the drop-down by the New Issue button
3. Edit the Scheme
4. Create a new Scheme field called DATE
5. Create a New Issue (when it's time to)
6. Enter the date you want in the DATE field
7. In the Publisher Set, select the folder which contains the items you want renamed, and hit Rename Items...
8. Select Custom Name and add the DATE field
9. Make sure you still have the other fields you need like ID and Name
10. These will be appended to the file name.
Of course you can add it to the front or in amongst any of the other fields you select.
Cheers,
Link.