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Category: SSL

Let’s Encrypt Will Switch to 64-Day SSL Certificates in February 2027

Let’s Encrypt will shorten its default SSL/TLS certificate lifetime from 90 days to 64 days on February 10, 2027. Website owners should review their renewal automation, certificate deployment, and expiration alerts before the change takes effect. In its October 7 announcement, Let’s Encrypt confirmed that certificates issued or renewed from that date will use the shorter lifetime […]

UptimeObserver Team

October 8, 2026 · 7:14 am

Common TLS Certificate and Handshake Errors: What They Mean and How to Fix Them

Note: Although the modern protocol is Transport Layer Security (TLS), the industry still commonly refers to TLS certificates as “SSL certificates.” TLS errors can be frustrating because browsers often reduce a complex certificate or handshake failure to a short message such as “Your connection is not private” or “SSL protocol error.” The important thing to understand is that […]

UptimeObserver Team

August 15, 2026 · 12:36 am

How to Monitor SSL Certificate Expiration

Terminology note: Although these are commonly called SSL certificates, modern public certificates are used with TLS. In this guide, we use “SSL certificate” where it matches common search terminology and “TLS certificate” when discussing the underlying technology. I remember the days when securing a website meant manually generating a Certificate Signing Request (CSR) on a server. […]

Lead Engineer @ UptimeObserver

April 8, 2026 · 6:02 am

SSL Certificate Validity Changes in 2026

If you’ve recently issued a new SSL/TLS certificate and noticed the expiration date is much sooner than expected, you aren’t alone. As of March 15, 2026, the industry has officially moved away from the 398-day (one-year) standard. We have entered a phased “step-down” period mandated by the CA/Browser Forum (Ballot SC-081). This represents one of […]

UptimeObserver Team

April 3, 2026 · 1:41 pm

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