If your CA doesn't let you renew your cert well in advance of expiry (which I find hard to believe), get a new cert on a different CA. You can have multiple ce

If your CA doesn't let you renew your cert well in advance of expiry (which I find hard to believe), get a new cert on a different CA. You can have multiple certs valid for the same domain name, from different providers; the active cert is the one you serve.