Today's-Date token for PDF
I think this would be a custom token to get it in the format that you're looking for, but it wouldn't be too difficult and I am pretty sure you'll be able to find one someone has already written -

Check out the bottom two links of this page:

https://forum.civicrm.org/index.php?topic=13757.0

The last post April 29: "We discovered at the sprint that just about everyone has written a token for this at some point"...

I think there was a good example on coleman's blog here, too, but the main content doesn't seem to be loading for me anymore:

https://civicrm.org/blog/colemanw/create-your-own-tokens-for-fun-and-profit (corrected link)