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Chrome ERR_CERT_DATE_INVALID — SSL Certificate Expired

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Overview

Chrome ERR_CERT_DATE_INVALID warning means the website's SSL certificate has expired or your device clock is set to the wrong date.

Key Details

  • SSL/TLS certificates have valid date ranges (Not Before and Not After)
  • Chrome checks certificate dates against your system clock
  • If your computer clock is wrong, valid certificates appear expired
  • Let's Encrypt certificates expire every 90 days and must be renewed
  • Chrome shows 'Your connection is not private' with NET::ERR_CERT_DATE_INVALID

Common Causes

  • The website SSL certificate has actually expired
  • Your computer date/time is set incorrectly
  • CMOS battery dead causing system clock reset on reboot
  • Time zone set incorrectly affecting UTC comparison
  • Website admin forgot to renew their Let's Encrypt certificate

Steps

  1. 1Check your system clock: is the date and time correct? Sync with internet time
  2. 2Windows: Settings > Time & language > Date & time > Set time automatically
  3. 3Mac: System Preferences > Date & Time > Set date and time automatically
  4. 4Click the padlock icon in Chrome's address bar > Certificate > check the 'Valid from' and 'Valid to' dates
  5. 5If the certificate is truly expired, contact the website owner — there is no fix on your end

Tags

chromesslcertificateexpiredsecurity

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Frequently Asked Questions

If your clock is wrong, fix it. If the certificate is actually expired, bypassing the warning means your connection is not encrypted. Avoid entering passwords or payment info.