LET'S ENCRYPT CUTS CERTIFICATE LIFETIMES TO 64 DAYS STARTING FEBRUARY 2027

Summary from the TLDR InfoSec newsletter

Let's Encrypt will cut certificate lifetimes from 90 to 64 days on February 10, with opt-in testing from October 14 and 45-day defaults planned for 2028, which will break renewals that run on hardcoded schedules instead of ACME ARI.