I noticed this on the page for today's UPF, but did some digging and it appears that anything posted in late September and October, at least, has timestamps with things like "5 hours ago" or "3 days ago".
October 26th's UPF is listed as "4 days ago". Seems like a 'month' field isn't being consulted? It seems like all carousels are affected.
I'm using Vivaldi browser, which is chromium based. User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.113 Safari/537.36 Vivaldi/2.1.1337.51