Direct link from=now-1h

I have been using direct link rendered images with &from=now-1h&to=now and similar for over a year. I just updated to the latest version and this no longer works. I see the examples use epoch time which is fine except I’m using these links on a different web server to embed graphs on my site of recent last hour, last day kind of things. I can’t generate links on the fly with hard coded epoch in them.

Is there a new format for dynamic ranges I’m missing?