Bonjour,
It expired this morning and will likely be renewed today.
Cheers
echo | openssl s_client -showcerts -servername mastodon.online -connect mastodon.online:443 2>/dev/null | openssl x509 -inform pem -noout -text
Certificate:
Data:
Version: 3 (0x2)
Serial Number:
03:e0:3c:19:67:5a:61:2c:7e:71:72:55:05:67:0d:b9:52:44
Signature Algorithm: sha256WithRSAEncryption
Issuer: C = US, O = Let's Encrypt, CN = R3
Validity
Not Before: May 26 06:49:36 2021 GMT
Not After : Aug 24 06:49:36 2021 GMT
Subject: CN = mastodon.online