blocked from displaying content?

[arizonarobin]

I am getting a message that this website (Forvm) is blocked from displaying content with security certificate errors. Although I am usually lurking, I am on Forvm just about every day and have never had this happen. Some areas like My Forvm won't display at all and others I can see but it is still blocking content. Has anyone else had this issue or does anyone know of a way to fix it?
I have tried Mozilla and Iexplorer and get similar messages on both.
Any insight is appreciated!
Robin 

[arizonarobin]

screen shot of error messages:

[Joe Sermarini]

I don't know what this could be.  Anyone else getting this?

[Jay GT4]

It looks like it's your computer's settings.

[David Atherton]

Certainly looks like it's a settings issue on your end Robin. Check your Firefox security settings and see if anything has recently changed. I use Firefox and have never had any issues with Forvm.

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

[arizonarobin]

Looks like it was only a my computer problem- namely letting my nephew use it to do his homework!
He changed the date by accident to 2010. I guess this renders all site certificates as out of date or no good. 

Thank you both- Robin

[areich]

Sometimes you do get this, in this case you can just click continue, even if it's not recommended. It's not unusual for certificates to expire so that a site is without a valid certificate for a few days or weeks, it happens even to competent webmasters.