SSL certificates used to last 5 years. Then 1 year. Soon, just 47 days. Starting March 2026, certificate lifespans will shrink in stages: March 2026 → ~200 days March 2027 → ~100 days March 2029 → 47 days Why is this happening?  If a certificate gets stolen or wrongly issued, a shorter lifespan limits the damage. Less time valid ...