What does NET::ERR_CERT_DATE_INVALID mean?

If you see the error:

NET::ERR_CERT_DATE_INVALID

when visiting a website, it usually means that the website’s SSL certificate is no longer valid. This can happen when the certificate has expired or when there is a problem with its validity period.

Because browsers can no longer verify the authenticity of the certificate, they display a warning indicating that the connection may not be secure.

Common Causes

Expired SSL Certificate

The most common cause is that the SSL certificate has reached its expiration date and has not been renewed.

Incorrect Server Date or Time

In some cases, the certificate may still be valid, but the server or visitor’s computer has an incorrect date or time configured, causing the browser to incorrectly interpret the certificate’s validity period.

Failed Certificate Renewal

Automatic SSL certificate renewal may have failed due to:

• DNS configuration issues
• Domain validation problems
• Website accessibility issues
• Temporary service interruptions

If You Use a Free Let’s Encrypt Certificate

To renew the certificate:

1. Log in to the mybox Panel.
2. Navigate to:

Websites

3. Select the affected website.
4. Open:

SSL Certificate

5. Use the option to generate or renew the SSL certificate.

After the renewal request is submitted, the certificate should be issued automatically.

If You Use a Commercial SSL Certificate

If the website uses a paid SSL certificate purchased through your hosting provider, contact support for assistance with certificate verification and renewal.

Additional Checks

Before requesting a new certificate, verify:

Domain DNS Configuration

Ensure the domain correctly points to the hosting account.

Website Accessibility

Make sure the website is publicly accessible and not protected by temporary maintenance rules that could prevent certificate validation.

Local Computer Time

Check that the device displaying the error has the correct:

• Date
• Time
• Time zone

An incorrect system clock can trigger certificate validity warnings even when the certificate is functioning properly.

Summary

The error:

NET::ERR_CERT_DATE_INVALID

typically indicates that the SSL certificate is expired, invalid, or cannot be validated correctly.

If you are using a free Let’s Encrypt certificate:

1. Open Websites in the mybox Panel.
2. Select the affected website.
3. Go to SSL Certificate.
4. Request a new certificate generation.

If the issue persists after renewal, verify your DNS configuration and contact support for further assistance.