I agreed I have gone so far as to replace strings in HTML with the date in the <time> tag, but it is not always available in that tag especially now with Javasc

I agreed I have gone so far as to replace strings in HTML with the date in the <time> tag, but it is not always available in that tag especially now with Javascript frameworks taking over. Further your wording makes it clear to me why date formatting is hard, what is most significant is clearly subjective.