Edge Certificate renewal window

Hello,

Is there a window for edge certificates to renew? Our last certificate had a expire date of 22.12.2022 but today we saw it renewed and has a new expire date 22.11.2023. Is it always renewing 1 month before expire date like this instance?

Thanks

I believe Cloudflare tries to renew the certificate 30 days before it expires, but it may be later or sooner. There is no guarantee that it is always 30 days before.