Suggest a sans-serif font for the monthly calendars on the background photos.
You pique my curiosity, so:

The biggest problem with sans-serif is that there can be letter confusion in certain instances, such as l (lower case L) and I (capital I) on some versions. That doesn't seem to be the case with what I'm seeing in this post (except that the l could seem to be an I if you don't have a comparison handy). It's amazing how many folks have read my login as Inuss rather than lnuss (lower case L).

In any case, what's wrong with the serif types? Your example is very readable.