ERR_CERT_DATE_INVALID means the website's SSL certificate has either expired or isn't valid yet. Chrome refuses to connect because it can't verify the site's security at this time. The most common cause is simply that the website owner forgot to renew their certificate.
First, check if your internet is working and what your current IP address is:
🔍 Check My IP Address →SSL certificates have a validity window — typically 90 days (Let's Encrypt) or up to 1 year (commercial CAs). Outside that window, Chrome rejects them. The error also fires if your system clock is wrong — Chrome uses your local time to check certificate validity dates.
This is the most common fixable cause on your end. Right-click the clock in your taskbar → Adjust date/time → toggle "Set time automatically" off and back on → click "Sync now." If your clock was more than a few minutes off, this will immediately fix the error on certificates that are still valid.
Click the padlock (or "Not secure") in Chrome's address bar → Certificate is not valid → Details. Look at the "Valid from" and "Valid to" dates. If today's date falls outside that range, the certificate is genuinely expired — it's the website's problem, not yours. Contact the site owner or wait for them to renew.
If the certificate was recently renewed but you're still seeing the error, Chrome may have cached the old expired certificate. Open Internet Options → Content → Clear SSL State. Also clear Chrome's cache at Ctrl+Shift+Delete → All time → Cached images → Clear data.
Open the URL in Chrome incognito (Ctrl+Shift+N). Incognito uses a fresh session without cached data. If the site loads in incognito, your cache has the old certificate stored. Clear your browsing data as in Fix 3.
Antivirus HTTPS inspection can sometimes present a certificate with incorrect validity dates. Temporarily disable SSL scanning in your antivirus and test. If the real site certificate was recently renewed, your antivirus may still have the expired version cached internally.
✅ Fixed it? Visit tools.examineip.com to confirm your IP address and connection are working correctly.
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Last updated: April 2, 2026 • Report an error