Any way to change date display on the right?

Probably a european thing, but I’ve deleted and undeleted a couple of posts believing I was necro-ing a very old post from Dec '14. It took me a while to realize that it actually means 14th of December.

Anything we can do about that? Any preferences I missed?

I think that does mean December 2014. If you hover over the date it will give you the full timestamp.