Hi Greg, first things first.
The page /nov05 is the permanent page containing the content for the day on the website. This means page /nov05 should have a Canonical Tag that points to itself and /foo should have a Canonical Tag that points to /nov05. Correct?
For the page /nov05, why would you need to place a canonical tag? Canonical tag has to be placed on a non-canonical page (page that is not preferred to appear in the search results) pointing to the canonical page which is the preferred one. In case of a home page where it can have multiple variations like, www, non-www, index.html etc, you can go for a canonical tag pointing to itself. In case where someone copies your page as it is along with source code, a canonical tag pointing to itself can be beneficial as no matter where it is, the page would be pointing to the original page on your website. But in general, you don't need to have a canonical tag pointing to the same page on which it resides. This is not mandatory.
Coming to your original issue at hand. It is not a sin to have duplicate content on the website and the intention behind it matters way more than the duplication itself. I don't think you are doing anything wrong here. In a situation like yours, considering the importance of the page /foo, you should not be placing a canonical tag on it. The best solution would be to leave it as it is and don't bother about the issue. Search engines like Google are very well aware of situations like this and can handle very well. Those were my two cents in this regard.
Best,
Devanur Rafi