How to Add one specific page to my RSS each day

I run a small site with a “This Day in History” feature. Publishing these entries as posts has become problematic, so I’ve converted them to static pages. Now, however, I need to find a way to make each page appear in my RSS feed on the appropriate day.

Most plug-ins add pages to your RSS feed as they’re created, not as the pages are modified. I was wondering if anyone can recommend a way to hack “RSS Includes Pages” or a similar plug-in to make it add one particular page to my RSS feed each day.

The page could be the last modified page in a particular category or a page with a particular creation date or a page with a particular title. I don’t care which method you use.