Yes, I'm about two decades late at a minimum writing this up.Finally created a bat file to back up my projects:

Edit: Gosh, thanks for flattening all my pre tags, new BlogThis interface!
Edit2: Ooops.  Guess I wasn't backing up before 10am very often?  Great solution to one-digit times in bat files from StackOverflow (well, ServerFault), inserted below in bold.  Changes all spaces to zeroes, I believe.

SET mydate=%date:~10,4%%date:~4,2%%date:~7,2%_%time:~0,2%%time:~3,2%%time:~6,2%
SET mydate=%mydate: =0% 
echo %mydate%

zip -r Z:\Documents\ C:\dir\to\Zip\up

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