Quick Answer: NET::ERR_CERT_DATE_INVALID almost always means your Chromebook’s system clock is set to the wrong date or time, not that the website’s security certificate is actually invalid. Fixing your Chromebook’s date and time settings resolves it in the vast majority of cases.
What Causes This Error
- Chromebook’s system clock is wrong – often from a dead internal clock battery on very old devices, or being offline for a long time
- Time zone set incorrectly, especially after travel
- The website’s SSL certificate has genuinely expired (less common, but possible)
- A network intercepting HTTPS traffic (some school/corporate filtering setups) with an improperly configured certificate
How to Fix It
Step 1: Check your Chromebook’s date and time
Click the status area (bottom-right) and look at the displayed time and date. If it’s wrong, click the status area again, go to Settings, and check the date/time section.
Step 2: Set time zone and clock to automatic
In Settings, search “Date and time” and make sure “Set time zone automatically” is enabled and the clock is set to sync automatically. This uses network time rather than relying on the Chromebook’s internal clock.
Step 3: Reconnect to the internet
If your Chromebook has been offline for an extended period (in storage, on a long flight, etc.), it may not have synced its clock recently. Connect to Wi-Fi and give it a minute to auto-correct.
Step 4: Restart your Chromebook
After correcting the date/time settings, restart to make sure the new time is fully applied system-wide, including to the certificate validation process.
Step 5: Try the site again
Reload the page. If the date is now correct and the error persists specifically on one site, that site’s certificate genuinely may have expired – this is on the website owner to fix, not something you can resolve locally.
Still Not Fixed?
If your clock is correct and the error only happens on one particular website, confirm the issue by checking the same site from another device. If it fails there too, the certificate is genuinely expired or misconfigured on the site’s end, and you should avoid entering any personal information until it’s fixed. If it only happens on your Chromebook across many sites, and the clock looks right, a school or work network filter intercepting HTTPS traffic could be the cause – contact the network administrator.
FAQ
Is it safe to click “Proceed anyway”?
Not recommended. This bypasses a security check meant to confirm you’re talking to the real website and not an imposter. Fix the underlying clock issue instead of bypassing the warning.
Why would my Chromebook’s clock be wrong in the first place?
Chromebooks typically sync time over the network rather than using a battery-backed hardware clock the way older laptops do, so a long period offline or a fresh recovery install can leave the clock stale until it reconnects.
Does this affect all browsers on the device?
Yes, since the system clock is shared – any app or browser doing certificate validation will show similar errors until the date and time are corrected.
