Your runtimes have an expiry date. I baked the EOL calendar into the app so it works offline. (opens in new tab)

Every runtime and piece of middleware you run has a quiet expiry date. PHP 8.0 went EOL in late 2023. Node 16 in 2023. Postgres 12 in 2024. After that: no security patches. The problem is never "we didn't know EOL was a thing" — it's that the EOL calendar lives in a dozen vendor pages and nobody checks them until an auditor does. I wanted my self-hosted ops tool to flag this automatically. The obvious move is to call an API like endoflife.date. But I made the default offline: the EOL calendar...