UPDATE: While the industry has shortened validity times, we still offer service plans of up to 2, 3, even 6 years—and the automation to make it seamless. Three, Two, One, Liftoff on One-Year TLS Certificates At the CA/Browser (CA/B) Forum in Bratislava, Slovakia, this week, Apple announced that beginning Sept. 1, newly issued publicly trusted TLS certificates are valid for no longer than 398 days.