My default Android browser is reporting that one of the HTTPS certificates expired on 02/01/2015 (not sure if M/D or D/M). My date and time setting on the device is up to date.
The site's certificate is valid. That's probably coming from an ad network which hasn't renewed their certificate. The error should provide more information, can you post it here?
Cookies on my Android tablet was not behaving well anyway. Should the browser closes, the cookies gets purged. And this is despite the keep cookies option being enabled.
OK, thanks, good to know. Apparently the site was referencing an old URL which presented that out-of-date certificate error for that company. This has been updated so the error should be gone now.