Visual timeline
Is your feature request related to a problem? Please describe. A visual timeline makes it easier to plan version updates.
Describe the solution you'd like
As per your own rant, PHP's support page is easy to read thanks to a visual calendar:

I notice that some pages already include this, like django; however that image was manually linked from Django's own documentation:

I think those should be generated from the data for all tools.
Describe alternatives you've considered
- Sticking to the current list is possible, it's just harder to parse
- Linking to existing images, however most tools don't have those handy, and they would be very mismatched which is both awkward and harder on users
+1. Would love for this to happen, but I couldn't find a nice and easy way to do this in Ruby/SVG. Suggestions welcome. This would also make for great og:image if we render them to JPG as well.
#259 would probably be a first step?
Please see PR https://github.com/endoflife-date/endoflife.date/pull/260 for #90 (#259 is a duplicate of #90) and feedback welcome on the JSON structure.
Started some work on this: at #285. Preview is available at https://deploy-preview-285--endoflife-date.netlify.app/centos, but it's still a WIP.