Strange dates for certificates, maybe cause of `Certificate Unknown`

[Pedro Assunção]

My certificate stopped working in my local dev env (using the local ACME server in 4002 port, as per docs). I noticed this in the server start up (both locally):

[info] Certificate successfully obtained! It is valid until 3020-05-31. Next renewal is scheduled for 3020-05-01.

Can that strange date have anything to do with it?

Thanks in advance.

[Saša Jurić]

The local ACME server issues self-signed certificates, which are by default rejected by the browsers & other clients. To use this certificate you need to add an exception in your browser, but be very careful with what you're allowing. You only want to do that for local development. Self-signed certificates shouldn't be used in prod.

The expiry date is intentionally set far into the future to avoid renewals in local dev/test.

[Pedro Assunção]

Thanks for the quick reply :)