As of March 15, 2026, the maximum lifetime for a TLS certificate will be 200 days.

As of March 15, 2027, the maximum lifetime for a TLS certificate will be 100 days.

As of March 15, 2029, the maximum lifetime for a TLS certificate will be 47 days.

As of March 15, 2026, the maximum period during which domain validation information may be reused is 200 days.

As of March 15, 2027, the maximum period during which domain validation information may be reused is 100 days.

As of March 15, 2029, the maximum period during which domain validation information may be reused is 10 days.

https://groups.google.com/a/groups.cabforum.org/g/servercert...