I generally agree with Dr. Blofeld here.  My own view, which I think I may have never expressed out loud before, is that it is no longer wise or useful to restrict DYK links on the front page to new articles.  At one time, this may have been a good way to incentivize people to write new articles on interesting topics, now it may be leading to unnecessary recentism as well as limiting the scope of what ought to be one of our most amazing and charming front page features.  People, including me, love "did you know" tidbits that are interesting and surprising - so why should we restrict ourselves to selecting just from new articles?  (And since I haven't commented yet, although my views are well known, I think using the Daily Mail as a source for fluff is a really bad idea, always.  There are rare cases where the Daily Mail and similar tabloids are acceptable for use in an encyclopedic context, but every use should be placed under the strictest possible scrutiny.)