I have also noticed that there is something off with the timestamp formatting on images either. 
Something tells me that the formatting is forced manually, which is not really a good thing to do, especially when it comes to the order of datums. Let the browser/user agent do its thing and better use dateStyle and timeStyle whenever possible. So, we should expect output on a Date object like this:
toLocaleString(undefined,{dateStyle:"medium",timeStyle:"short"})
dateStyle:"medium" should be short enough in all locales for the current layout.