If the time doesn't have to be a separate block- level element, it could be marked up simply as<dialog> <dt>caker (<time>21:57</time>)</dt> <dd>sweet</dd> ...
I proposed exactly this a while back, FWIW: http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2006-December/008833.html -- Simon Pieters
