Update the editor to something that handles times, while remaining simple if all you care about is day.
Store the time/date in some standard way that allows going at least ~100+ years in the past (handling all living people's birth dates), and well into the future.
Conveniently, we have a formatting system, so let's expose the chunks in cards and use that!
In English, something like:
...resulting in: Monday, May 10, 1:49 PM 2010
Note that if it's Basic, Wagn should treat it like a form (i.e., show the markup even when viewing as content/open/closed). If it's a Pointer, Wagn should treat cards in the Pointer like they're forms.