Displaying relative time like “1 day ago” is especially foolish. Does that mean between 0s–23:59:59? Or 24:00:00–47:59:59? Or perhaps 24:00:00–6d 23:59:59?
When you have multiple browser tabs open and switch between them, and you see “just now” — is it really just now? You last looked at that tab an hour ago. Maybe two hours? Maybe it’s been open since yesterday.
Sometimes I wonder why the Accept-Timezone header doesn’t exist in web browser requests. Using Accept-Language to switch webpage language based on the same URL is now commonplace.
There would likely be demand for a feature where the <html> contains a Unix timestamp, and the browser renders it using the client’s local time zone:
<time epochMs="1234567890123" format="YYYY/MM/DD HH:mm:ss" />
Just write it into static HTML and you’re done. No need for the server to compute relative times, and no need to rewrite it dynamically with JavaScript.
What happened to the movement to abolish daylight saving time? A few years ago, I kept hearing that the US and EU were moving toward ending it. Yet here we are, still observing DST this year.