A certificate validity timeline shrinking from 398 days to 200, 100 and finally 47 days

Guides9 Nov 2026 · 4 min read

How to check an SSL certificate, and get ready for 47-day certificates

Certificates bought today last at most 200 days, falling to 100 days in March 2027 and 47 days in 2029. Here’s how to check a certificate properly, the five problems that cause browser warnings, and how to automate…

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