For one site I ended up having to go digging through other random articles until I found one that was dated for a day beyond the 12th in order to be able to tell. And it wasn't like I could just guess from the site, because the site in general seemed international in scope but the article itself was specific to Australia. So it really could have been anything (though it ended up being the American order).

To be fair, out of all the ones written numerically year-month-day is the best one. It's just difficult to read when you're used to dates being written in the completely opposite order. Half the time I'll be looking at dates and automatically reading the month as the day, until I realise what I've been doing and go "...wait. This isn't February, it's October!"